252420815 has 4 divisors (see below), whose sum is σ = 302904984. Its totient is φ = 201936648.

The previous prime is 252420739. The next prime is 252420827. The reversal of 252420815 is 518024252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252420815 - 2²⁴ = 235643599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25242077 + ... + 25242086.

It is an arithmetic number, because the mean of its divisors is an integer number (75726246).

Almost surely, 2^252420815 is an apocalyptic number.

252420815 is a deficient number, since it is larger than the sum of its proper divisors (50484169).

252420815 is an equidigital number, since it uses as much as digits as its factorization.

252420815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50484168.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 252420815 is about 15887.7567642509. The cubic root of 252420815 is about 631.9873540371.

The spelling of 252420815 in words is "two hundred fifty-two million, four hundred twenty thousand, eight hundred fifteen".