22165139997 has 256 divisors, whose sum is σ = 46495088640. Its totient is φ = 10059033600.

The previous prime is 22165139993. The next prime is 22165140029. The reversal of 22165139997 is 79993156122.

22165139997 is a `hidden beast` number, since 2 + 2 + 165 + 1 + 399 + 97 = 666.

It is not a de Polignac number, because 22165139997 - 2² = 22165139993 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22165139993) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 112513303 + ... + 112513499.

It is an arithmetic number, because the mean of its divisors is an integer number (181621440).

Almost surely, 2^22165139997 is an apocalyptic number.

22165139997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22165139997 is an abundant number, since it is smaller than the sum of its proper divisors (24329948643).

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

22165139997 is a wasteful number, since it uses less digits than its factorization.

22165139997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 435 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 22165139997 in words is "twenty-two billion, one hundred sixty-five million, one hundred thirty-nine thousand, nine hundred ninety-seven".