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525031031 = 7247227977
BaseRepresentation
bin11111010010110…
…101011001110111
31100120221100011202
4133102311121313
52033401443111
6124033123115
716003455500
oct3722653167
91316840152
10525031031
1124a403648
121279b949b
1384a0a465
144da2dba7
153115eb3b
hex1f4b5677

525031031 has 12 divisors (see below), whose sum is σ = 623747808. Its totient is φ = 440449632.

The previous prime is 525031021. The next prime is 525031057. The reversal of 525031031 is 130130525.

It is not a de Polignac number, because 525031031 - 218 = 524768887 is a prime.

It is a super-2 number, since 2×5250310312 = 551315167025845922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 525030994 and 525031012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525031021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111686 + ... + 116291.

It is an arithmetic number, because the mean of its divisors is an integer number (51978984).

Almost surely, 2525031031 is an apocalyptic number.

525031031 is a deficient number, since it is larger than the sum of its proper divisors (98716777).

525031031 is a wasteful number, since it uses less digits than its factorization.

525031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228038 (or 228031 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 525031031 is about 22913.5556167086. Note that the first 3 decimals coincide. The cubic root of 525031031 is about 806.7302167640.

Adding to 525031031 its reverse (130130525), we get a palindrome (655161556).

The spelling of 525031031 in words is "five hundred twenty-five million, thirty-one thousand, thirty-one".

Divisors: 1 7 47 49 329 2303 227977 1595839 10714919 11170873 75004433 525031031