22149812531 has 16 divisors (see below), whose sum is σ = 28567607040. Its totient is φ = 16664434080.

The previous prime is 22149812527. The next prime is 22149812543. The reversal of 22149812531 is 13521894122.

It is not a de Polignac number, because 22149812531 - 2² = 22149812527 is a prime.

It is a super-2 number, since 2×22149812531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22149812131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4957421 + ... + 4961886.

It is an arithmetic number, because the mean of its divisors is an integer number (1785475440).

Almost surely, 2^22149812531 is an apocalyptic number.

22149812531 is a deficient number, since it is larger than the sum of its proper divisors (6417794509).

22149812531 is a wasteful number, since it uses less digits than its factorization.

22149812531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9919354.

The product of its digits is 34560, while the sum is 38.

The spelling of 22149812531 in words is "twenty-two billion, one hundred forty-nine million, eight hundred twelve thousand, five hundred thirty-one".