252621516 has 48 divisors (see below), whose sum is σ = 681246720. Its totient is φ = 71364480.

The previous prime is 252621497. The next prime is 252621521. The reversal of 252621516 is 615126252.

It is a super-2 number, since 2×252621516² = 127635260692276512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9420 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (14192640).

Almost surely, 2^252621516 is an apocalyptic number.

It is an amenable number.

252621516 is an abundant number, since it is smaller than the sum of its proper divisors (428625204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252621516 is a wasteful number, since it uses less digits than its factorization.

252621516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33894 (or 33892 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 252621516 is about 15894.0717250175. The cubic root of 252621516 is about 632.1548083886.

Adding to 252621516 its reverse (615126252), we get a palindrome (867747768).

It can be divided in two parts, 2526 and 21516, that added together give a palindrome (24042).

The spelling of 252621516 in words is "two hundred fifty-two million, six hundred twenty-one thousand, five hundred sixteen".