257225756 has 6 divisors (see below), whose sum is σ = 450145080. Its totient is φ = 128612876.

The previous prime is 257225741. The next prime is 257225789. The reversal of 257225756 is 657522752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32153216 + ... + 32153223.

It is an arithmetic number, because the mean of its divisors is an integer number (75024180).

Almost surely, 2^257225756 is an apocalyptic number.

It is an amenable number.

257225756 is a deficient number, since it is larger than the sum of its proper divisors (192919324).

257225756 is a wasteful number, since it uses less digits than its factorization.

257225756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64306443 (or 64306441 counting only the distinct ones).

The product of its digits is 294000, while the sum is 41.

The square root of 257225756 is about 16038.2591324620. The cubic root of 257225756 is about 635.9722276021.

The spelling of 257225756 in words is "two hundred fifty-seven million, two hundred twenty-five thousand, seven hundred fifty-six".