253787531 has 2 divisors, whose sum is σ = 253787532. Its totient is φ = 253787530.

The previous prime is 253787461. The next prime is 253787533. The reversal of 253787531 is 135787352.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253787531 is a prime.

It is a super-2 number, since 2×253787531² = 128816221782151922, which contains 22 as substring.

Together with 253787533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253787533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126893765 + 126893766.

It is an arithmetic number, because the mean of its divisors is an integer number (126893766).

Almost surely, 2^253787531 is an apocalyptic number.

253787531 is a deficient number, since it is larger than the sum of its proper divisors (1).

253787531 is an equidigital number, since it uses as much as digits as its factorization.

253787531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 41.

The square root of 253787531 is about 15930.7103105919. The cubic root of 253787531 is about 633.1259196766.

The spelling of 253787531 in words is "two hundred fifty-three million, seven hundred eighty-seven thousand, five hundred thirty-one".