253902521 has 2 divisors, whose sum is σ = 253902522. Its totient is φ = 253902520.

The previous prime is 253902469. The next prime is 253902527. The reversal of 253902521 is 125209352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232410025 + 21492496 = 15245^2 + 4636^2 .

It is a cyclic number.

It is not a de Polignac number, because 253902521 - 2⁶ = 253902457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253902527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126951260 + 126951261.

It is an arithmetic number, because the mean of its divisors is an integer number (126951261).

Almost surely, 2^253902521 is an apocalyptic number.

It is an amenable number.

253902521 is a deficient number, since it is larger than the sum of its proper divisors (1).

253902521 is an equidigital number, since it uses as much as digits as its factorization.

253902521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 253902521 is about 15934.3189688170. The cubic root of 253902521 is about 633.2215274164.

The spelling of 253902521 in words is "two hundred fifty-three million, nine hundred two thousand, five hundred twenty-one".