252131687 has 2 divisors, whose sum is σ = 252131688. Its totient is φ = 252131686.

The previous prime is 252131669. The next prime is 252131689. The reversal of 252131687 is 786131252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252131687 - 2²⁶ = 185022823 is a prime.

Together with 252131689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252131689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126065843 + 126065844.

It is an arithmetic number, because the mean of its divisors is an integer number (126065844).

Almost surely, 2^252131687 is an apocalyptic number.

252131687 is a deficient number, since it is larger than the sum of its proper divisors (1).

252131687 is an equidigital number, since it uses as much as digits as its factorization.

252131687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 252131687 is about 15878.6550752890. The cubic root of 252131687 is about 631.7459647393.

The spelling of 252131687 in words is "two hundred fifty-two million, one hundred thirty-one thousand, six hundred eighty-seven".