257930531 has 2 divisors, whose sum is σ = 257930532. Its totient is φ = 257930530.

The previous prime is 257930527. The next prime is 257930539. The reversal of 257930531 is 135039752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257930531 - 2² = 257930527 is a prime.

It is a super-2 number, since 2×257930531² = 133056317643883922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257930491 and 257930500.

It is not a weakly prime, because it can be changed into another prime (257930539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128965265 + 128965266.

It is an arithmetic number, because the mean of its divisors is an integer number (128965266).

Almost surely, 2^257930531 is an apocalyptic number.

257930531 is a deficient number, since it is larger than the sum of its proper divisors (1).

257930531 is an equidigital number, since it uses as much as digits as its factorization.

257930531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 257930531 is about 16060.2157831083. The cubic root of 257930531 is about 636.5525331380.

The spelling of 257930531 in words is "two hundred fifty-seven million, nine hundred thirty thousand, five hundred thirty-one".