656710431 has 16 divisors (see below), whose sum is σ = 943453056. Its totient is φ = 403922016.

The previous prime is 656710393. The next prime is 656710451. The reversal of 656710431 is 134017656.

It is not a de Polignac number, because 656710431 - 2⁷ = 656710303 is a prime.

It is a super-2 number, since 2×656710431² = 862537180368411522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656710392 and 656710401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656710451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112716 + ... + 118398.

It is an arithmetic number, because the mean of its divisors is an integer number (58965816).

Almost surely, 2^656710431 is an apocalyptic number.

656710431 is a deficient number, since it is larger than the sum of its proper divisors (286742625).

656710431 is a wasteful number, since it uses less digits than its factorization.

656710431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 656710431 is about 25626.3620320950. The cubic root of 656710431 is about 869.2098480493.

The spelling of 656710431 in words is "six hundred fifty-six million, seven hundred ten thousand, four hundred thirty-one".