22157213641 has 16 divisors (see below), whose sum is σ = 23616308160. Its totient is φ = 20728664640.

The previous prime is 22157213633. The next prime is 22157213711. The reversal of 22157213641 is 14631275122.

It is a cyclic number.

It is not a de Polignac number, because 22157213641 - 2³ = 22157213633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22157213597 and 22157213606.

It is not an unprimeable number, because it can be changed into a prime (22157210641) 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, 627271 + ... + 661651.

It is an arithmetic number, because the mean of its divisors is an integer number (1476019260).

Almost surely, 2^22157213641 is an apocalyptic number.

It is an amenable number.

22157213641 is a deficient number, since it is larger than the sum of its proper divisors (1459094519).

22157213641 is a wasteful number, since it uses less digits than its factorization.

22157213641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34824.

The product of its digits is 20160, while the sum is 34.

Adding to 22157213641 its reverse (14631275122), we get a palindrome (36788488763).

The spelling of 22157213641 in words is "twenty-two billion, one hundred fifty-seven million, two hundred thirteen thousand, six hundred forty-one".