252646431 has 4 divisors (see below), whose sum is σ = 336861912. Its totient is φ = 168430952.

The previous prime is 252646423. The next prime is 252646447. The reversal of 252646431 is 134646252.

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

It is a cyclic number.

It is not a de Polignac number, because 252646431 - 2³ = 252646423 is a prime.

It is a super-2 number, since 2×252646431² = 127660438194075522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252646392 and 252646401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252646831) 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, 42107736 + ... + 42107741.

It is an arithmetic number, because the mean of its divisors is an integer number (84215478).

Almost surely, 2^252646431 is an apocalyptic number.

252646431 is a deficient number, since it is larger than the sum of its proper divisors (84215481).

252646431 is an equidigital number, since it uses as much as digits as its factorization.

252646431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84215480.

The product of its digits is 34560, while the sum is 33.

The square root of 252646431 is about 15894.8554884906. The cubic root of 252646431 is about 632.1755899641.

The spelling of 252646431 in words is "two hundred fifty-two million, six hundred forty-six thousand, four hundred thirty-one".