252651531 has 32 divisors (see below), whose sum is σ = 395873280. Its totient is φ = 141674400.

The previous prime is 252651517. The next prime is 252651533. The reversal of 252651531 is 135156252.

It is a happy number.

It is not a de Polignac number, because 252651531 - 2¹¹ = 252649483 is a prime.

It is a super-2 number, since 2×252651531² = 127665592233287922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252651533) 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 31 ways as a sum of consecutive naturals, for example, 22276 + ... + 31646.

It is an arithmetic number, because the mean of its divisors is an integer number (12371040).

Almost surely, 2^252651531 is an apocalyptic number.

252651531 is a deficient number, since it is larger than the sum of its proper divisors (143221749).

252651531 is a wasteful number, since it uses less digits than its factorization.

252651531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447.

The product of its digits is 9000, while the sum is 30.

The square root of 252651531 is about 15895.0159169470. The cubic root of 252651531 is about 632.1798437003.

It can be divided in two parts, 25265 and 1531, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 252651531 in words is "two hundred fifty-two million, six hundred fifty-one thousand, five hundred thirty-one".