252311531 has 4 divisors (see below), whose sum is σ = 252765072. Its totient is φ = 251857992.

The previous prime is 252311519. The next prime is 252311551. The reversal of 252311531 is 135113252.

It is a happy number.

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 252311531 - 2¹⁰ = 252310507 is a prime.

It is a super-2 number, since 2×252311531² = 127322217351127922, 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 = 252311497 and 252311506.

It is not an unprimeable number, because it can be changed into a prime (252311551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225935 + ... + 227048.

It is an arithmetic number, because the mean of its divisors is an integer number (63191268).

Almost surely, 2^252311531 is an apocalyptic number.

252311531 is a deficient number, since it is larger than the sum of its proper divisors (453541).

252311531 is an equidigital number, since it uses as much as digits as its factorization.

252311531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453540.

The product of its digits is 900, while the sum is 23.

The square root of 252311531 is about 15884.3171398710. The cubic root of 252311531 is about 631.8961358920.

Adding to 252311531 its reverse (135113252), we get a palindrome (387424783).

It can be divided in two parts, 25231 and 1531, that added together give a palindrome (26762).

The spelling of 252311531 in words is "two hundred fifty-two million, three hundred eleven thousand, five hundred thirty-one".