13266516231 has 56 divisors (see below), whose sum is σ = 20461746960. Its totient is φ = 8593693056.

The previous prime is 13266516209. The next prime is 13266516259. The reversal of 13266516231 is 13261566231.

13266516231 is a `hidden beast` number, since 1 + 3 + 26 + 6 + 5 + 1 + 623 + 1 = 666.

It is not a de Polignac number, because 13266516231 - 2⁷ = 13266516103 is a prime.

It is a super-2 number, since 2×13266516231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13266516031) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4132555 + ... + 4135763.

Almost surely, 2^13266516231 is an apocalyptic number.

13266516231 is a deficient number, since it is larger than the sum of its proper divisors (7195230729).

13266516231 is an equidigital number, since it uses as much as digits as its factorization.

13266516231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387 (or 3372 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 13266516231 in words is "thirteen billion, two hundred sixty-six million, five hundred sixteen thousand, two hundred thirty-one".