253256685 has 16 divisors (see below), whose sum is σ = 442048320. Its totient is φ = 122791040.

The previous prime is 253256677. The next prime is 253256743. The reversal of 253256685 is 586652352.

It is not a de Polignac number, because 253256685 - 2³ = 253256677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767280 + ... + 767609.

It is an arithmetic number, because the mean of its divisors is an integer number (27628020).

Almost surely, 2^253256685 is an apocalyptic number.

It is an amenable number.

253256685 is a deficient number, since it is larger than the sum of its proper divisors (188791635).

253256685 is a wasteful number, since it uses less digits than its factorization.

253256685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534908.

The product of its digits is 432000, while the sum is 42.

The square root of 253256685 is about 15914.0404988802. The cubic root of 253256685 is about 632.6841761868.

The spelling of 253256685 in words is "two hundred fifty-three million, two hundred fifty-six thousand, six hundred eighty-five".