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512424250 = 25313157669
BaseRepresentation
bin11110100010101…
…111100100111010
31022201012211220221
4132202233210322
52022140034000
6122503010254
715461351152
oct3642574472
91281184827
10512424250
11243282a18
1212373998a
1382215220
144c0ab762
152eebe61a
hex1e8af93a

512424250 has 32 divisors (see below), whose sum is σ = 1033053840. Its totient is φ = 189201600.

The previous prime is 512424233. The next prime is 512424259. The reversal of 512424250 is 52424215.

It can be written as a sum of positive squares in 8 ways, for example, as 16426809 + 495997441 = 4053^2 + 22271^2 .

It is a super-2 number, since 2×5124242502 = 525157223976125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (512424259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75585 + ... + 82084.

Almost surely, 2512424250 is an apocalyptic number.

512424250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

512424250 is an abundant number, since it is smaller than the sum of its proper divisors (520629590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512424250 is a wasteful number, since it uses less digits than its factorization.

512424250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157699 (or 157689 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 512424250 is about 22636.7897458982. The cubic root of 512424250 is about 800.2209025386.

Adding to 512424250 its reverse (52424215), we get a palindrome (564848465).

The spelling of 512424250 in words is "five hundred twelve million, four hundred twenty-four thousand, two hundred fifty".

Divisors: 1 2 5 10 13 25 26 50 65 125 130 250 325 650 1625 3250 157669 315338 788345 1576690 2049697 3941725 4099394 7883450 10248485 19708625 20496970 39417250 51242425 102484850 256212125 512424250