252121555 has 8 divisors (see below), whose sum is σ = 345766752. Its totient is φ = 172883328.

The previous prime is 252121537. The next prime is 252121567. The reversal of 252121555 is 555121252.

252121555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252121555 - 2⁵ = 252121523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3601702 + ... + 3601771.

It is an arithmetic number, because the mean of its divisors is an integer number (43220844).

Almost surely, 2^252121555 is an apocalyptic number.

252121555 is a deficient number, since it is larger than the sum of its proper divisors (93645197).

252121555 is an equidigital number, since it uses as much as digits as its factorization.

252121555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203485.

The product of its digits is 5000, while the sum is 28.

The square root of 252121555 is about 15878.3360274306. The cubic root of 252121555 is about 631.7375023151.

The spelling of 252121555 in words is "two hundred fifty-two million, one hundred twenty-one thousand, five hundred fifty-five".