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56513107031 = 94379598789
BaseRepresentation
bin110100101000011100…
…011001010001010111
312101212111101021211012
4310220130121101113
51411214323411111
641543424002435
74040306324663
oct645034312127
9171774337735
1056513107031
1121a701a2837
12ab5216041b
13543822c704
142a417478a3
15170b58448b
hexd28719457

56513107031 has 4 divisors (see below), whose sum is σ = 56513800200. Its totient is φ = 56512413864.

The previous prime is 56513107019. The next prime is 56513107081. The reversal of 56513107031 is 13070131565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13070131565 = 52614026313.

It is a cyclic number.

It is not a de Polignac number, because 56513107031 - 26 = 56513106967 is a prime.

It is a super-2 number, since 2×565131070312 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56513107081) 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 3 ways as a sum of consecutive naturals, for example, 205016 + ... + 393773.

It is an arithmetic number, because the mean of its divisors is an integer number (14128450050).

Almost surely, 256513107031 is an apocalyptic number.

56513107031 is a deficient number, since it is larger than the sum of its proper divisors (693169).

56513107031 is an equidigital number, since it uses as much as digits as its factorization.

56513107031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693168.

The product of its (nonzero) digits is 9450, while the sum is 32.

Adding to 56513107031 its reverse (13070131565), we get a palindrome (69583238596).

The spelling of 56513107031 in words is "fifty-six billion, five hundred thirteen million, one hundred seven thousand, thirty-one".

Divisors: 1 94379 598789 56513107031