252631 has 4 divisors (see below), whose sum is σ = 253872. Its totient is φ = 251392.

The previous prime is 252617. The next prime is 252641. The reversal of 252631 is 136252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 252631 - 2¹¹ = 250583 is a prime.

It is a super-2 number, since 2×252631² = 127644844322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

252631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 252599 and 252608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (63468).

2²⁵²⁶³¹ is an apocalyptic number.

252631 is a deficient number, since it is larger than the sum of its proper divisors (1241).

252631 is an equidigital number, since it uses as much as digits as its factorization.

252631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240.

The product of its digits is 360, while the sum is 19.

The square root of 252631 is about 502.6241140256. The cubic root of 252631 is about 63.2162719144.

Adding to 252631 its reverse (136252), we get a palindrome (388883).

The spelling of 252631 in words is "two hundred fifty-two thousand, six hundred thirty-one".