531688257 has 12 divisors (see below), whose sum is σ = 778811904. Its totient is φ = 349466040.

The previous prime is 531688219. The next prime is 531688271. The reversal of 531688257 is 752886135.

531688257 is a `hidden beast` number, since 5 + 316 + 88 + 257 = 666.

It is not a de Polignac number, because 531688257 - 2¹⁴ = 531671873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531688207) 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, 415393 + ... + 416670.

It is an arithmetic number, because the mean of its divisors is an integer number (64900992).

Almost surely, 2^531688257 is an apocalyptic number.

It is an amenable number.

531688257 is a deficient number, since it is larger than the sum of its proper divisors (247123647).

531688257 is a wasteful number, since it uses less digits than its factorization.

531688257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832140 (or 832137 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 531688257 is about 23058.3663124689. The cubic root of 531688257 is about 810.1256000934.

It can be divided in two parts, 53168 and 8257, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 531688257 in words is "five hundred thirty-one million, six hundred eighty-eight thousand, two hundred fifty-seven".