252431917 has 4 divisors (see below), whose sum is σ = 252476476. Its totient is φ = 252387360.

The previous prime is 252431873. The next prime is 252431941. The reversal of 252431917 is 719134252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107205316 + 145226601 = 10354^2 + 12051^2 .

It is a cyclic number.

It is not a de Polignac number, because 252431917 - 2²³ = 244043309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252431987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12288 + ... + 25609.

It is an arithmetic number, because the mean of its divisors is an integer number (63119119).

Almost surely, 2^252431917 is an apocalyptic number.

It is an amenable number.

252431917 is a deficient number, since it is larger than the sum of its proper divisors (44559).

252431917 is an equidigital number, since it uses as much as digits as its factorization.

252431917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44558.

The product of its digits is 15120, while the sum is 34.

The square root of 252431917 is about 15888.1061489405. The cubic root of 252431917 is about 631.9966192804.

The spelling of 252431917 in words is "two hundred fifty-two million, four hundred thirty-one thousand, nine hundred seventeen".