22255218909 has 252 divisors, whose sum is σ = 45076019520. Its totient is φ = 10912255200.

The previous prime is 22255218907. The next prime is 22255219001. The reversal of 22255218909 is 90981255222.

It is a happy number.

22255218909 is a `hidden beast` number, since 2 + 2 + 2 + 552 + 1 + 8 + 90 + 9 = 666.

It is not a de Polignac number, because 22255218909 - 2¹ = 22255218907 is a prime.

It is a super-2 number, since 2×22255218909² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255218901) by changing a digit.

It is a polite number, since it can be written in 251 ways as a sum of consecutive naturals, for example, 82122444 + ... + 82122714.

Almost surely, 2^22255218909 is an apocalyptic number.

It is an amenable number.

22255218909 is an abundant number, since it is smaller than the sum of its proper divisors (22820800611).

22255218909 is a wasteful number, since it uses less digits than its factorization.

22255218909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 22255218909 in words is "twenty-two billion, two hundred fifty-five million, two hundred eighteen thousand, nine hundred nine".