22251997617 has 16 divisors (see below), whose sum is σ = 30475516032. Its totient is φ = 14431685760.

The previous prime is 22251997613. The next prime is 22251997619. The reversal of 22251997617 is 71679915222.

It is not a de Polignac number, because 22251997617 - 2² = 22251997613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22251997617.

It is not an unprimeable number, because it can be changed into a prime (22251997613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1472892 + ... + 1487922.

It is an arithmetic number, because the mean of its divisors is an integer number (1904719752).

Almost surely, 2^22251997617 is an apocalyptic number.

It is an amenable number.

22251997617 is a deficient number, since it is larger than the sum of its proper divisors (8223518415).

22251997617 is a wasteful number, since it uses less digits than its factorization.

22251997617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28408.

The product of its digits is 952560, while the sum is 51.

The spelling of 22251997617 in words is "twenty-two billion, two hundred fifty-one million, nine hundred ninety-seven thousand, six hundred seventeen".