12216790531 has 12 divisors (see below), whose sum is σ = 13891424400. Its totient is φ = 10723198640.

The previous prime is 12216790489. The next prime is 12216790559. The reversal of 12216790531 is 13509761221.

It is not a de Polignac number, because 12216790531 - 2¹¹ = 12216788483 is a prime.

It is a super-2 number, since 2×12216790531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12216790231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1737271 + ... + 1744288.

It is an arithmetic number, because the mean of its divisors is an integer number (1157618700).

Almost surely, 2^12216790531 is an apocalyptic number.

12216790531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12216790531 is a deficient number, since it is larger than the sum of its proper divisors (1674633869).

12216790531 is a wasteful number, since it uses less digits than its factorization.

12216790531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3481610 (or 3481599 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 12216790531 in words is "twelve billion, two hundred sixteen million, seven hundred ninety thousand, five hundred thirty-one".