257725512 has 48 divisors (see below), whose sum is σ = 761464080. Its totient is φ = 78098400.

The previous prime is 257725499. The next prime is 257725513. The reversal of 257725512 is 215527752.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (257725513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161914 + ... + 163497.

It is an arithmetic number, because the mean of its divisors is an integer number (15863835).

Almost surely, 2^257725512 is an apocalyptic number.

257725512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

257725512 is an abundant number, since it is smaller than the sum of its proper divisors (503738568).

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

257725512 is a wasteful number, since it uses less digits than its factorization.

257725512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325434 (or 325427 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 257725512 is about 16053.8316921537. The cubic root of 257725512 is about 636.3838314383.

The spelling of 257725512 in words is "two hundred fifty-seven million, seven hundred twenty-five thousand, five hundred twelve".