636222252 has 96 divisors (see below), whose sum is σ = 1570464000. Its totient is φ = 200247552.

The previous prime is 636222203. The next prime is 636222317. The reversal of 636222252 is 252222636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3903123 + ... + 3903285.

It is an arithmetic number, because the mean of its divisors is an integer number (16359000).

Almost surely, 2^636222252 is an apocalyptic number.

It is an amenable number.

636222252 is an abundant number, since it is smaller than the sum of its proper divisors (934241748).

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

636222252 is a wasteful number, since it uses less digits than its factorization.

636222252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 413 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 636222252 is about 25223.4464734699. The cubic root of 636222252 is about 860.0749222630.

Adding to 636222252 its reverse (252222636), we get a palindrome (888444888).

The spelling of 636222252 in words is "six hundred thirty-six million, two hundred twenty-two thousand, two hundred fifty-two".