22144331391 has 64 divisors (see below), whose sum is σ = 38944647168. Its totient is φ = 10870599168.

The previous prime is 22144331371. The next prime is 22144331411. The reversal of 22144331391 is 19313344122.

It is an interprime number because it is at equal distance from previous prime (22144331371) and next prime (22144331411).

It is not a de Polignac number, because 22144331391 - 2²³ = 22135942783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144331311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 184665 + ... + 279981.

It is an arithmetic number, because the mean of its divisors is an integer number (608510112).

Almost surely, 2^22144331391 is an apocalyptic number.

22144331391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22144331391 is a deficient number, since it is larger than the sum of its proper divisors (16800315777).

22144331391 is a wasteful number, since it uses less digits than its factorization.

22144331391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95400.

The product of its digits is 15552, while the sum is 33.

The spelling of 22144331391 in words is "twenty-two billion, one hundred forty-four million, three hundred thirty-one thousand, three hundred ninety-one".