22115721431 has 8 divisors (see below), whose sum is σ = 22332735744. Its totient is φ = 21899437560.

The previous prime is 22115721427. The next prime is 22115721449. The reversal of 22115721431 is 13412751122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22115721431 - 2² = 22115721427 is a prime.

It is a super-2 number, since 2×22115721431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22115721394 and 22115721403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115721451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121661 + ... + 242966.

It is an arithmetic number, because the mean of its divisors is an integer number (2791591968).

Almost surely, 2^22115721431 is an apocalyptic number.

22115721431 is a deficient number, since it is larger than the sum of its proper divisors (217014313).

22115721431 is a wasteful number, since it uses less digits than its factorization.

22115721431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365221.

The product of its digits is 3360, while the sum is 29.

The spelling of 22115721431 in words is "twenty-two billion, one hundred fifteen million, seven hundred twenty-one thousand, four hundred thirty-one".