252297138 has 16 divisors (see below), whose sum is σ = 504758016. Its totient is φ = 84071760.

The previous prime is 252297121. The next prime is 252297139. The reversal of 252297138 is 831792252.

252297138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 252297096 and 252297105.

It is not an unprimeable number, because it can be changed into a prime (252297139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23748 + ... + 32688.

It is an arithmetic number, because the mean of its divisors is an integer number (31547376).

Almost surely, 2^252297138 is an apocalyptic number.

252297138 is an abundant number, since it is smaller than the sum of its proper divisors (252460878).

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

252297138 is a wasteful number, since it uses less digits than its factorization.

252297138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13649.

The product of its digits is 60480, while the sum is 39.

The square root of 252297138 is about 15883.8640764771. The cubic root of 252297138 is about 631.8841202514.

The spelling of 252297138 in words is "two hundred fifty-two million, two hundred ninety-seven thousand, one hundred thirty-eight".