16513228931 has 4 divisors (see below), whose sum is σ = 16783937664. Its totient is φ = 16242520200.

The previous prime is 16513228903. The next prime is 16513228961. The reversal of 16513228931 is 13982231561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13982231561 = 3539 ⋅3950899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16513228931 is a prime.

It is a super-2 number, since 2×16513228931² (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 (16513228961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135354275 + ... + 135354396.

It is an arithmetic number, because the mean of its divisors is an integer number (4195984416).

Almost surely, 2^16513228931 is an apocalyptic number.

16513228931 is a deficient number, since it is larger than the sum of its proper divisors (270708733).

16513228931 is an equidigital number, since it uses as much as digits as its factorization.

16513228931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270708732.

The product of its digits is 77760, while the sum is 41.

The spelling of 16513228931 in words is "sixteen billion, five hundred thirteen million, two hundred twenty-eight thousand, nine hundred thirty-one".