22251561156 has 36 divisors (see below), whose sum is σ = 61360366704. Its totient is φ = 6742897200.

The previous prime is 22251561131. The next prime is 22251561169. The reversal of 22251561156 is 65116515222.

22251561156 is a `hidden beast` number, since 2 + 2 + 25 + 15 + 611 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22251561156.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28095010 + ... + 28095801.

Almost surely, 2^22251561156 is an apocalyptic number.

It is an amenable number.

22251561156 is an abundant number, since it is smaller than the sum of its proper divisors (39108805548).

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

22251561156 is a wasteful number, since it uses less digits than its factorization.

22251561156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56190832 (or 56190827 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The spelling of 22251561156 in words is "twenty-two billion, two hundred fifty-one million, five hundred sixty-one thousand, one hundred fifty-six".