22151715172 has 6 divisors (see below), whose sum is σ = 38765501558. Its totient is φ = 11075857584.

The previous prime is 22151715149. The next prime is 22151715191. The reversal of 22151715172 is 27151715122.

It can be written as a sum of positive squares in only one way, i.e., 18809025316 + 3342689856 = 137146^2 + 57816^2 .

It is a super-2 number, since 2×22151715172² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2768964393 + ... + 2768964400.

Almost surely, 2^22151715172 is an apocalyptic number.

It is an amenable number.

22151715172 is a deficient number, since it is larger than the sum of its proper divisors (16613786386).

22151715172 is a wasteful number, since it uses less digits than its factorization.

22151715172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5537928797 (or 5537928795 counting only the distinct ones).

The product of its digits is 9800, while the sum is 34.

The spelling of 22151715172 in words is "twenty-two billion, one hundred fifty-one million, seven hundred fifteen thousand, one hundred seventy-two".