252222142 has 4 divisors (see below), whose sum is σ = 378333216. Its totient is φ = 126111070.

The previous prime is 252222079. The next prime is 252222151. The reversal of 252222142 is 241222252.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63055534 + ... + 63055537.

It is an arithmetic number, because the mean of its divisors is an integer number (94583304).

Almost surely, 2^252222142 is an apocalyptic number.

252222142 is a deficient number, since it is larger than the sum of its proper divisors (126111074).

252222142 is a wasteful number, since it uses less digits than its factorization.

252222142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126111073.

The product of its digits is 1280, while the sum is 22.

The square root of 252222142 is about 15881.5031404461. The cubic root of 252222142 is about 631.8215042977.

Adding to 252222142 its reverse (241222252), we get a palindrome (493444394).

The spelling of 252222142 in words is "two hundred fifty-two million, two hundred twenty-two thousand, one hundred forty-two".