656853231 has 4 divisors (see below), whose sum is σ = 875804312. Its totient is φ = 437902152.

The previous prime is 656853229. The next prime is 656853233. The reversal of 656853231 is 132358656.

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

It is an interprime number because it is at equal distance from previous prime (656853229) and next prime (656853233).

It is not a de Polignac number, because 656853231 - 2¹ = 656853229 is a prime.

It is a super-2 number, since 2×656853231² = 862912334150278722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656853231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656853233) 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, 109475536 + ... + 109475541.

It is an arithmetic number, because the mean of its divisors is an integer number (218951078).

Almost surely, 2^656853231 is an apocalyptic number.

656853231 is a deficient number, since it is larger than the sum of its proper divisors (218951081).

656853231 is a wasteful number, since it uses less digits than its factorization.

656853231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218951080.

The product of its digits is 129600, while the sum is 39.

The square root of 656853231 is about 25629.1480740192. The cubic root of 656853231 is about 869.2728459678.

The spelling of 656853231 in words is "six hundred fifty-six million, eight hundred fifty-three thousand, two hundred thirty-one".