257222972 has 12 divisors (see below), whose sum is σ = 450437736. Its totient is φ = 128526480.

The previous prime is 257222957. The next prime is 257223091. The reversal of 257222972 is 279222752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14183 + ... + 26750.

It is an arithmetic number, because the mean of its divisors is an integer number (37536478).

Almost surely, 2^257222972 is an apocalyptic number.

It is an amenable number.

257222972 is a deficient number, since it is larger than the sum of its proper divisors (193214764).

257222972 is a wasteful number, since it uses less digits than its factorization.

257222972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42508 (or 42506 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 257222972 is about 16038.1723397649. The cubic root of 257222972 is about 635.9699331804.

The spelling of 257222972 in words is "two hundred fifty-seven million, two hundred twenty-two thousand, nine hundred seventy-two".