56012531 has 4 divisors (see below), whose sum is σ = 57315192. Its totient is φ = 54709872.

The previous prime is 56012483. The next prime is 56012549. The reversal of 56012531 is 13521065.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56012531 is a prime.

It is a super-2 number, since 2×56012531² = 6274807258051922, 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 = 56012497 and 56012506.

It is not an unprimeable number, because it can be changed into a prime (56012581) 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, 651266 + ... + 651351.

It is an arithmetic number, because the mean of its divisors is an integer number (14328798).

Almost surely, 2^56012531 is an apocalyptic number.

56012531 is a deficient number, since it is larger than the sum of its proper divisors (1302661).

56012531 is a wasteful number, since it uses less digits than its factorization.

56012531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302660.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 56012531 is about 7484.1519893706. The cubic root of 56012531 is about 382.6147712603.

Adding to 56012531 its reverse (13521065), we get a palindrome (69533596).

The spelling of 56012531 in words is "fifty-six million, twelve thousand, five hundred thirty-one".