22072156 has 24 divisors (see below), whose sum is σ = 39376400. Its totient is φ = 10824192.

The previous prime is 22072139. The next prime is 22072163. The reversal of 22072156 is 65127022.

It is a self number, because there is not a number n which added to its sum of digits gives 22072156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63070 + ... + 63418.

Almost surely, 2^22072156 is an apocalyptic number.

It is an amenable number.

22072156 is a deficient number, since it is larger than the sum of its proper divisors (17304244).

22072156 is a wasteful number, since it uses less digits than its factorization.

22072156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 22072156 is about 4698.1013186180. The cubic root of 22072156 is about 280.5099380801.

Adding to 22072156 its reverse (65127022), we get a palindrome (87199178).

The spelling of 22072156 in words is "twenty-two million, seventy-two thousand, one hundred fifty-six".