252438431 has 4 divisors (see below), whose sum is σ = 288501072. Its totient is φ = 216375792.

The previous prime is 252438413. The next prime is 252438449. The reversal of 252438431 is 134834252.

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

It is an interprime number because it is at equal distance from previous prime (252438413) and next prime (252438449).

It is a cyclic number.

It is not a de Polignac number, because 252438431 - 2¹⁰ = 252437407 is a prime.

It is a super-2 number, since 2×252438431² = 127450322891483522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252438401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18031310 + ... + 18031323.

It is an arithmetic number, because the mean of its divisors is an integer number (72125268).

Almost surely, 2^252438431 is an apocalyptic number.

252438431 is a deficient number, since it is larger than the sum of its proper divisors (36062641).

252438431 is an equidigital number, since it uses as much as digits as its factorization.

252438431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36062640.

The product of its digits is 23040, while the sum is 32.

The square root of 252438431 is about 15888.3111437308. The cubic root of 252438431 is about 632.0020554532.

The spelling of 252438431 in words is "two hundred fifty-two million, four hundred thirty-eight thousand, four hundred thirty-one".