257564522 has 4 divisors (see below), whose sum is σ = 386346786. Its totient is φ = 128782260.

The previous prime is 257564519. The next prime is 257564533. The reversal of 257564522 is 225465752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 217887121 + 39677401 = 14761^2 + 6299^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64391129 + ... + 64391132.

Almost surely, 2^257564522 is an apocalyptic number.

257564522 is a deficient number, since it is larger than the sum of its proper divisors (128782264).

257564522 is a wasteful number, since it uses less digits than its factorization.

257564522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128782263.

The product of its digits is 168000, while the sum is 38.

The square root of 257564522 is about 16048.8168411257. The cubic root of 257564522 is about 636.2512966703.

The spelling of 257564522 in words is "two hundred fifty-seven million, five hundred sixty-four thousand, five hundred twenty-two".