56309528031 has 4 divisors (see below), whose sum is σ = 75079370712. Its totient is φ = 37539685352.

The previous prime is 56309528017. The next prime is 56309528047. The reversal of 56309528031 is 13082590365.

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

It is a cyclic number.

It is not a de Polignac number, because 56309528031 - 2⁷ = 56309527903 is a prime.

It is a super-2 number, since 2×56309528031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56309528531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9384921336 + ... + 9384921341.

It is an arithmetic number, because the mean of its divisors is an integer number (18769842678).

Almost surely, 2^56309528031 is an apocalyptic number.

56309528031 is a deficient number, since it is larger than the sum of its proper divisors (18769842681).

56309528031 is a wasteful number, since it uses less digits than its factorization.

56309528031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18769842680.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 56309528031 in words is "fifty-six billion, three hundred nine million, five hundred twenty-eight thousand, thirty-one".