22215681828 has 36 divisors (see below), whose sum is σ = 59111903760. Its totient is φ = 7015478256.

The previous prime is 22215681823. The next prime is 22215681833. The reversal of 22215681828 is 82818651222.

22215681828 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 568 + 1 + 82 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (22215681823) and next prime (22215681833).

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

It is not an unprimeable number, because it can be changed into a prime (22215681823) 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, 16238850 + ... + 16240217.

Almost surely, 2^22215681828 is an apocalyptic number.

It is an amenable number.

22215681828 is an abundant number, since it is smaller than the sum of its proper divisors (36896221932).

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

22215681828 is a wasteful number, since it uses less digits than its factorization.

22215681828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32479096 (or 32479091 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The spelling of 22215681828 in words is "twenty-two billion, two hundred fifteen million, six hundred eighty-one thousand, eight hundred twenty-eight".