22255561531 has 16 divisors (see below), whose sum is σ = 26550612160. Its totient is φ = 18256337280.

The previous prime is 22255561529. The next prime is 22255561547. The reversal of 22255561531 is 13516555222.

It is a cyclic number.

It is not a de Polignac number, because 22255561531 - 2¹ = 22255561529 is a prime.

It is a super-2 number, since 2×22255561531² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22255561591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688536 + ... + 720133.

It is an arithmetic number, because the mean of its divisors is an integer number (1659413260).

Almost surely, 2^22255561531 is an apocalyptic number.

22255561531 is a deficient number, since it is larger than the sum of its proper divisors (4295050629).

22255561531 is a wasteful number, since it uses less digits than its factorization.

22255561531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408774.

The product of its digits is 90000, while the sum is 37.

The spelling of 22255561531 in words is "twenty-two billion, two hundred fifty-five million, five hundred sixty-one thousand, five hundred thirty-one".