56331002981 has 4 divisors (see below), whose sum is σ = 61452003264. Its totient is φ = 51210002700.

The previous prime is 56331002927. The next prime is 56331002983. The reversal of 56331002981 is 18920013365.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56331002981 - 2²⁶ = 56263894117 is a prime.

It is a super-2 number, since 2×56331002981² (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 (56331002983) 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 3 ways as a sum of consecutive naturals, for example, 2560500125 + ... + 2560500146.

It is an arithmetic number, because the mean of its divisors is an integer number (15363000816).

Almost surely, 2^56331002981 is an apocalyptic number.

It is an amenable number.

56331002981 is a deficient number, since it is larger than the sum of its proper divisors (5121000283).

56331002981 is a wasteful number, since it uses less digits than its factorization.

56331002981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121000282.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 56331002981 in words is "fifty-six billion, three hundred thirty-one million, two thousand, nine hundred eighty-one".