252015531 has 32 divisors (see below), whose sum is σ = 373621248. Its totient is φ = 150289920.

The previous prime is 252015529. The next prime is 252015541. The reversal of 252015531 is 135510252.

It is a happy number.

It is not a de Polignac number, because 252015531 - 2¹ = 252015529 is a prime.

It is a super-2 number, since 2×252015531² = 127023655730423922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252015541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211720 + ... + 212906.

It is an arithmetic number, because the mean of its divisors is an integer number (11675664).

Almost surely, 2^252015531 is an apocalyptic number.

252015531 is a deficient number, since it is larger than the sum of its proper divisors (121605717).

252015531 is a wasteful number, since it uses less digits than its factorization.

252015531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 252015531 is about 15874.9970393698. The cubic root of 252015531 is about 631.6489356077.

Adding to 252015531 its reverse (135510252), we get a palindrome (387525783).

The spelling of 252015531 in words is "two hundred fifty-two million, fifteen thousand, five hundred thirty-one".