252315243 has 10 divisors (see below), whose sum is σ = 376915484. Its totient is φ = 168210108.

The previous prime is 252315209. The next prime is 252315251. The reversal of 252315243 is 342513252.

It is a happy number.

It is not a de Polignac number, because 252315243 - 2⁶ = 252315179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252315253) 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 9 ways as a sum of consecutive naturals, for example, 1557421 + ... + 1557582.

Almost surely, 2^252315243 is an apocalyptic number.

252315243 is a deficient number, since it is larger than the sum of its proper divisors (124600241).

252315243 is an equidigital number, since it uses as much as digits as its factorization.

252315243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115015 (or 3115006 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 252315243 is about 15884.4339842501. The cubic root of 252315243 is about 631.8992346894.

Adding to 252315243 its reverse (342513252), we get a palindrome (594828495).

It can be divided in two parts, 2523 and 15243, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 252315243 in words is "two hundred fifty-two million, three hundred fifteen thousand, two hundred forty-three".