252057138 has 16 divisors (see below), whose sum is σ = 526032576. Its totient is φ = 80366000.

The previous prime is 252057133. The next prime is 252057199. The reversal of 252057138 is 831750252.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 252057099 and 252057108.

It is not an unprimeable number, because it can be changed into a prime (252057133) 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, 913113 + ... + 913388.

It is an arithmetic number, because the mean of its divisors is an integer number (32877036).

Almost surely, 2^252057138 is an apocalyptic number.

252057138 is an abundant number, since it is smaller than the sum of its proper divisors (273975438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252057138 is a wasteful number, since it uses less digits than its factorization.

252057138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826529.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 252057138 is about 15876.3074422235. The cubic root of 252057138 is about 631.6836948028.

The spelling of 252057138 in words is "two hundred fifty-two million, fifty-seven thousand, one hundred thirty-eight".