252621524 has 12 divisors (see below), whose sum is σ = 442268148. Its totient is φ = 126259200.

The previous prime is 252621521. The next prime is 252621527. The reversal of 252621524 is 425126252.

It is an interprime number because it is at equal distance from previous prime (252621521) and next prime (252621527).

It can be written as a sum of positive squares in 2 ways, for example, as 61905424 + 190716100 = 7868^2 + 13810^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252621521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557 + ... + 22484.

It is an arithmetic number, because the mean of its divisors is an integer number (36855679).

Almost surely, 2^252621524 is an apocalyptic number.

It is an amenable number.

252621524 is a deficient number, since it is larger than the sum of its proper divisors (189646624).

252621524 is a wasteful number, since it uses less digits than its factorization.

252621524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25786 (or 25784 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 252621524 is about 15894.0719766836. The cubic root of 252621524 is about 632.1548150616.

Adding to 252621524 its reverse (425126252), we get a palindrome (677747776).

The spelling of 252621524 in words is "two hundred fifty-two million, six hundred twenty-one thousand, five hundred twenty-four".