252321031 has 4 divisors (see below), whose sum is σ = 252839632. Its totient is φ = 251802432.

The previous prime is 252320951. The next prime is 252321061. The reversal of 252321031 is 130123252.

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 252321031 - 2²¹ = 250223879 is a prime.

It is a super-2 number, since 2×252321031² = 127331805369805922, 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 (252321061) 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, 258570 + ... + 259543.

It is an arithmetic number, because the mean of its divisors is an integer number (63209908).

Almost surely, 2^252321031 is an apocalyptic number.

252321031 is a deficient number, since it is larger than the sum of its proper divisors (518601).

252321031 is an equidigital number, since it uses as much as digits as its factorization.

252321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518600.

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

The square root of 252321031 is about 15884.6161741479. The cubic root of 252321031 is about 631.9040664820.

Adding to 252321031 its reverse (130123252), we get a palindrome (382444283).

The spelling of 252321031 in words is "two hundred fifty-two million, three hundred twenty-one thousand, thirty-one".