656215051031 has 8 divisors (see below), whose sum is σ = 666889158000. Its totient is φ = 645566822208.

The previous prime is 656215050983. The next prime is 656215051099. The reversal of 656215051031 is 130150512656.

656215051031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656215051031 is a prime.

It is a super-2 number, since 2×656215051031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656215050982 and 656215051000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656215051631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6418406 + ... + 6519843.

It is an arithmetic number, because the mean of its divisors is an integer number (83361144750).

Almost surely, 2^656215051031 is an apocalyptic number.

656215051031 is a deficient number, since it is larger than the sum of its proper divisors (10674106969).

656215051031 is a wasteful number, since it uses less digits than its factorization.

656215051031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12939073.

The product of its (nonzero) digits is 27000, while the sum is 35.

Adding to 656215051031 its reverse (130150512656), we get a palindrome (786365563687).

The spelling of 656215051031 in words is "six hundred fifty-six billion, two hundred fifteen million, fifty-one thousand, thirty-one".