257530533 has 16 divisors (see below), whose sum is σ = 372011136. Its totient is φ = 157527360.

The previous prime is 257530523. The next prime is 257530571. The reversal of 257530533 is 335035752.

It is not a de Polignac number, because 257530533 - 2²² = 253336229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257530494 and 257530503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257530523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13258 + ... + 26283.

It is an arithmetic number, because the mean of its divisors is an integer number (23250696).

Almost surely, 2^257530533 is an apocalyptic number.

It is an amenable number.

257530533 is a deficient number, since it is larger than the sum of its proper divisors (114480603).

257530533 is a wasteful number, since it uses less digits than its factorization.

257530533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39724.

The product of its (nonzero) digits is 47250, while the sum is 33.

The square root of 257530533 is about 16047.7578807757. The cubic root of 257530533 is about 636.2233082185.

The spelling of 257530533 in words is "two hundred fifty-seven million, five hundred thirty thousand, five hundred thirty-three".