22155521055 has 32 divisors (see below), whose sum is σ = 36442994688. Its totient is φ = 11488224000.

The previous prime is 22155521051. The next prime is 22155521077. The reversal of 22155521055 is 55012555122.

It is a happy number.

It is not a de Polignac number, because 22155521055 - 2² = 22155521051 is a prime.

It is a super-2 number, since 2×22155521055² (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 (22155521051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2395 + ... + 210515.

It is an arithmetic number, because the mean of its divisors is an integer number (1138843584).

Almost surely, 2^22155521055 is an apocalyptic number.

22155521055 is a deficient number, since it is larger than the sum of its proper divisors (14287473633).

22155521055 is a wasteful number, since it uses less digits than its factorization.

22155521055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208327.

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 22155521055 in words is "twenty-two billion, one hundred fifty-five million, five hundred twenty-one thousand, fifty-five".