257500530 has 96 divisors (see below), whose sum is σ = 810186624. Its totient is φ = 55392768.

The previous prime is 257500511. The next prime is 257500549. The reversal of 257500530 is 35005752.

It is an interprime number because it is at equal distance from previous prime (257500511) and next prime (257500549).

It is a junction number, because it is equal to n+sod(n) for n = 257500494 and 257500503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1312 + ... + 22731.

It is an arithmetic number, because the mean of its divisors is an integer number (8439444).

Almost surely, 2^257500530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257500530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405093312).

257500530 is an abundant number, since it is smaller than the sum of its proper divisors (552686094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257500530 is a wasteful number, since it uses less digits than its factorization.

257500530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24080 (or 24077 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 257500530 is about 16046.8230500620. The cubic root of 257500530 is about 636.1986000166.

The spelling of 257500530 in words is "two hundred fifty-seven million, five hundred thousand, five hundred thirty".