252121551 has 8 divisors (see below), whose sum is σ = 366722304. Its totient is φ = 152800920.

The previous prime is 252121537. The next prime is 252121567. The reversal of 252121551 is 155121252.

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

It is not a de Polignac number, because 252121551 - 2²⁵ = 218567119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252121501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3819991 + ... + 3820056.

It is an arithmetic number, because the mean of its divisors is an integer number (45840288).

Almost surely, 2^252121551 is an apocalyptic number.

252121551 is a deficient number, since it is larger than the sum of its proper divisors (114600753).

252121551 is a wasteful number, since it uses less digits than its factorization.

252121551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640061.

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

The square root of 252121551 is about 15878.3359014728. The cubic root of 252121551 is about 631.7374989742.

The spelling of 252121551 in words is "two hundred fifty-two million, one hundred twenty-one thousand, five hundred fifty-one".