22161575144 has 8 divisors (see below), whose sum is σ = 41552953410. Its totient is φ = 11080787568.

The previous prime is 22161575083. The next prime is 22161575153. The reversal of 22161575144 is 44157516122.

It can be written as a sum of positive squares in only one way, i.e., 14199582244 + 7961992900 = 119162^2 + 89230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×22161575144² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22161575098 and 22161575107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385098439 + ... + 1385098454.

Almost surely, 2^22161575144 is an apocalyptic number.

It is an amenable number.

22161575144 is a deficient number, since it is larger than the sum of its proper divisors (19391378266).

22161575144 is a wasteful number, since it uses less digits than its factorization.

22161575144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770196899 (or 2770196895 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The spelling of 22161575144 in words is "twenty-two billion, one hundred sixty-one million, five hundred seventy-five thousand, one hundred forty-four".