656553231 has 12 divisors (see below), whose sum is σ = 949658008. Its totient is φ = 437100624.

The previous prime is 656553229. The next prime is 656553251. The reversal of 656553231 is 132355656.

656553231 is a `hidden beast` number, since 65 + 65 + 532 + 3 + 1 = 666.

It is not a de Polignac number, because 656553231 - 2¹ = 656553229 is a prime.

It is a super-2 number, since 2×656553231² = 862124290273078722, which 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 (656553211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43165 + ... + 56358.

Almost surely, 2^656553231 is an apocalyptic number.

656553231 is a deficient number, since it is larger than the sum of its proper divisors (293104777).

656553231 is a wasteful number, since it uses less digits than its factorization.

656553231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100262 (or 100259 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 656553231 is about 25623.2946944767. The cubic root of 656553231 is about 869.1404868384.

It can be divided in two parts, 65655 and 3231, that added together give a palindrome (68886).

The spelling of 656553231 in words is "six hundred fifty-six million, five hundred fifty-three thousand, two hundred thirty-one".