253765531 has 2 divisors, whose sum is σ = 253765532. Its totient is φ = 253765530.

The previous prime is 253765493. The next prime is 253765541. The reversal of 253765531 is 135567352.

253765531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253765531 - 2¹¹ = 253763483 is a prime.

It is a super-2 number, since 2×253765531² = 128793889447423922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253765541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126882765 + 126882766.

It is an arithmetic number, because the mean of its divisors is an integer number (126882766).

Almost surely, 2^253765531 is an apocalyptic number.

253765531 is a deficient number, since it is larger than the sum of its proper divisors (1).

253765531 is an equidigital number, since it uses as much as digits as its factorization.

253765531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 37.

The square root of 253765531 is about 15930.0198053863. The cubic root of 253765531 is about 633.1076246187.

The spelling of 253765531 in words is "two hundred fifty-three million, seven hundred sixty-five thousand, five hundred thirty-one".