252369021 has 16 divisors (see below), whose sum is σ = 345635840. Its totient is φ = 163704240.

The previous prime is 252368989. The next prime is 252369031. The reversal of 252369021 is 120963252.

It is not a de Polignac number, because 252369021 - 2⁵ = 252368989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252369021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252369031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31350 + ... + 38568.

It is an arithmetic number, because the mean of its divisors is an integer number (21602240).

Almost surely, 2^252369021 is an apocalyptic number.

It is an amenable number.

252369021 is a deficient number, since it is larger than the sum of its proper divisors (93266819).

252369021 is a wasteful number, since it uses less digits than its factorization.

252369021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7536.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 252369021 is about 15886.1266833675. The cubic root of 252369021 is about 631.9441254414.

The spelling of 252369021 in words is "two hundred fifty-two million, three hundred sixty-nine thousand, twenty-one".