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755220505 = 51337314021
BaseRepresentation
bin101101000000111…
…100000000011001
31221122002011202211
4231000330000121
53021314024010
6202534555121
724500161024
oct5500740031
91848064684
10755220505
11358336386
12190b08aa1
13c0604a50
14724301bb
154647e08a
hex2d03c019

755220505 has 16 divisors (see below), whose sum is σ = 1002358224. Its totient is φ = 542626560.

The previous prime is 755220503. The next prime is 755220527. The reversal of 755220505 is 505022557.

It can be written as a sum of positive squares in 8 ways, for example, as 3583449 + 751637056 = 1893^2 + 27416^2 .

It is not a de Polignac number, because 755220505 - 21 = 755220503 is a prime.

It is a super-2 number, since 2×7552205052 = 1140716022344910050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (755220503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154606 + ... + 159415.

It is an arithmetic number, because the mean of its divisors is an integer number (62647389).

Almost surely, 2755220505 is an apocalyptic number.

It is an amenable number.

755220505 is a deficient number, since it is larger than the sum of its proper divisors (247137719).

755220505 is a wasteful number, since it uses less digits than its factorization.

755220505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314076.

The product of its (nonzero) digits is 17500, while the sum is 31.

The square root of 755220505 is about 27481.2755344434. The cubic root of 755220505 is about 910.6634878710.

The spelling of 755220505 in words is "seven hundred fifty-five million, two hundred twenty thousand, five hundred five".

Divisors: 1 5 13 37 65 185 481 2405 314021 1570105 4082273 11618777 20411365 58093885 151044101 755220505