257068215 has 32 divisors (see below), whose sum is σ = 458136000. Its totient is φ = 136765440.

The previous prime is 257068199. The next prime is 257068261. The reversal of 257068215 is 512860752.

It is a happy number.

257068215 is a `hidden beast` number, since 2 + 570 + 6 + 82 + 1 + 5 = 666.

It is not a de Polignac number, because 257068215 - 2⁴ = 257068199 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 257068215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58495 + ... + 62735.

It is an arithmetic number, because the mean of its divisors is an integer number (14316750).

Almost surely, 2^257068215 is an apocalyptic number.

257068215 is a deficient number, since it is larger than the sum of its proper divisors (201067785).

257068215 is a wasteful number, since it uses less digits than its factorization.

257068215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704 (or 4698 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 257068215 is about 16033.3469681162. The cubic root of 257068215 is about 635.8423648131.

The spelling of 257068215 in words is "two hundred fifty-seven million, sixty-eight thousand, two hundred fifteen".