252631631 has 4 divisors (see below), whose sum is σ = 288721872. Its totient is φ = 216541392.

The previous prime is 252631591. The next prime is 252631633. The reversal of 252631631 is 136136252.

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 252631631 - 2⁶ = 252631567 is a prime.

It is a super-2 number, since 2×252631631² = 127645481963440322, 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 = 252631594 and 252631603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252631633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18045110 + ... + 18045123.

It is an arithmetic number, because the mean of its divisors is an integer number (72180468).

Almost surely, 2^252631631 is an apocalyptic number.

252631631 is a deficient number, since it is larger than the sum of its proper divisors (36090241).

252631631 is an equidigital number, since it uses as much as digits as its factorization.

252631631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36090240.

The product of its digits is 6480, while the sum is 29.

The square root of 252631631 is about 15894.3899222336. The cubic root of 252631631 is about 632.1632454643.

Adding to 252631631 its reverse (136136252), we get a palindrome (388767883).

The spelling of 252631631 in words is "two hundred fifty-two million, six hundred thirty-one thousand, six hundred thirty-one".