523431657 has 48 divisors (see below), whose sum is σ = 895639680. Its totient is φ = 288377856.

The previous prime is 523431641. The next prime is 523431659. The reversal of 523431657 is 756134325.

It is not a de Polignac number, because 523431657 - 2⁴ = 523431641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (523431659) 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 47 ways as a sum of consecutive naturals, for example, 195673 + ... + 198329.

It is an arithmetic number, because the mean of its divisors is an integer number (18659160).

Almost surely, 2^523431657 is an apocalyptic number.

It is an amenable number.

523431657 is a deficient number, since it is larger than the sum of its proper divisors (372208023).

523431657 is a wasteful number, since it uses less digits than its factorization.

523431657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782 (or 2779 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 523431657 is about 22878.6288269206. The cubic root of 523431657 is about 805.9102171623.

The spelling of 523431657 in words is "five hundred twenty-three million, four hundred thirty-one thousand, six hundred fifty-seven".