253990557 has 12 divisors (see below), whose sum is σ = 388456380. Its totient is φ = 159366528.

The previous prime is 253990553. The next prime is 253990571. The reversal of 253990557 is 755099352.

253990557 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 90 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 121418361 + 132572196 = 11019^2 + 11514^2 .

It is not a de Polignac number, because 253990557 - 2² = 253990553 is a prime.

It is a super-2 number, since 2×253990557² = 129022406090340498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253990553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 829882 + ... + 830187.

It is an arithmetic number, because the mean of its divisors is an integer number (32371365).

Almost surely, 2^253990557 is an apocalyptic number.

It is an amenable number.

253990557 is a deficient number, since it is larger than the sum of its proper divisors (134465823).

253990557 is a wasteful number, since it uses less digits than its factorization.

253990557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660092 (or 1660089 counting only the distinct ones).

The product of its (nonzero) digits is 425250, while the sum is 45.

The square root of 253990557 is about 15937.0811944973. The cubic root of 253990557 is about 633.2947049078.

It can be divided in two parts, 2539 and 90557, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 253990557 in words is "two hundred fifty-three million, nine hundred ninety thousand, five hundred fifty-seven".