252226138 has 4 divisors (see below), whose sum is σ = 378339210. Its totient is φ = 126113068.

The previous prime is 252226097. The next prime is 252226141. The reversal of 252226138 is 831622252.

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

It can be written as a sum of positive squares in only one way, i.e., 126405049 + 125821089 = 11243^2 + 11217^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63056533 + ... + 63056536.

Almost surely, 2^252226138 is an apocalyptic number.

252226138 is a deficient number, since it is larger than the sum of its proper divisors (126113072).

252226138 is a wasteful number, since it uses less digits than its factorization.

252226138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126113071.

The product of its digits is 11520, while the sum is 31.

The square root of 252226138 is about 15881.6289466792. The cubic root of 252226138 is about 631.8248409667.

The spelling of 252226138 in words is "two hundred fifty-two million, two hundred twenty-six thousand, one hundred thirty-eight".