252121515 has 32 divisors (see below), whose sum is σ = 432331776. Its totient is φ = 125136000.

The previous prime is 252121501. The next prime is 252121523. The reversal of 252121515 is 515121252.

252121515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 252121515 - 2⁵ = 252121483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2890 + ... + 22640.

It is an arithmetic number, because the mean of its divisors is an integer number (13510368).

Almost surely, 2^252121515 is an apocalyptic number.

252121515 is a deficient number, since it is larger than the sum of its proper divisors (180210261).

252121515 is a wasteful number, since it uses less digits than its factorization.

252121515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19819.

The product of its digits is 1000, while the sum is 24.

The square root of 252121515 is about 15878.3347678527. The cubic root of 252121515 is about 631.7374689060.

Adding to 252121515 its reverse (515121252), we get a palindrome (767242767).

The spelling of 252121515 in words is "two hundred fifty-two million, one hundred twenty-one thousand, five hundred fifteen".