252400031 has 8 divisors (see below), whose sum is σ = 272277600. Its totient is φ = 232588512.

The previous prime is 252400019. The next prime is 252400039. The reversal of 252400031 is 130004252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252400031 - 2⁶ = 252399967 is a prime.

It is a super-2 number, since 2×252400031² = 127411551297601922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252399982 and 252400009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252400039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8420 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (34034700).

Almost surely, 2^252400031 is an apocalyptic number.

252400031 is a deficient number, since it is larger than the sum of its proper divisors (19877569).

252400031 is a wasteful number, since it uses less digits than its factorization.

252400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33025.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 252400031 is about 15887.1026622226. The cubic root of 252400031 is about 631.9700078901.

Adding to 252400031 its reverse (130004252), we get a palindrome (382404283).

The spelling of 252400031 in words is "two hundred fifty-two million, four hundred thousand, thirty-one".