22051554231 has 24 divisors (see below), whose sum is σ = 34227177600. Its totient is φ = 12591763632.

The previous prime is 22051554227. The next prime is 22051554251. The reversal of 22051554231 is 13245515022.

It is not a de Polignac number, because 22051554231 - 2² = 22051554227 is a prime.

It is a super-2 number, since 2×22051554231² (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 (22051554251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152040 + ... + 259266.

It is an arithmetic number, because the mean of its divisors is an integer number (1426132400).

Almost surely, 2^22051554231 is an apocalyptic number.

22051554231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22051554231 is a deficient number, since it is larger than the sum of its proper divisors (12175623369).

22051554231 is a wasteful number, since it uses less digits than its factorization.

22051554231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108643 (or 108636 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 22051554231 in words is "twenty-two billion, fifty-one million, five hundred fifty-four thousand, two hundred thirty-one".