22215506643 has 12 divisors (see below), whose sum is σ = 35006253048. Its totient is φ = 13463943360.

The previous prime is 22215506581. The next prime is 22215506647. The reversal of 22215506643 is 34660551222.

22215506643 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 5 + 5 + 0 + 6 + 643 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-22215506643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22215506598 and 22215506607.

It is not an unprimeable number, because it can be changed into a prime (22215506647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112199430 + ... + 112199627.

It is an arithmetic number, because the mean of its divisors is an integer number (2917187754).

Almost surely, 2^22215506643 is an apocalyptic number.

22215506643 is a deficient number, since it is larger than the sum of its proper divisors (12790746405).

22215506643 is a wasteful number, since it uses less digits than its factorization.

22215506643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224399074 (or 224399071 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 22215506643 in words is "twenty-two billion, two hundred fifteen million, five hundred six thousand, six hundred forty-three".