13235513431 has 12 divisors (see below), whose sum is σ = 15445937520. Its totient is φ = 11308234560.

The previous prime is 13235513399. The next prime is 13235513471. The reversal of 13235513431 is 13431553231.

It is a happy number.

It is not a de Polignac number, because 13235513431 - 2⁵ = 13235513399 is a prime.

It is a super-2 number, since 2×13235513431² (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 = 13235513393 and 13235513402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13235513471) 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, 419026 + ... + 449503.

It is an arithmetic number, because the mean of its divisors is an integer number (1287161460).

Almost surely, 2^13235513431 is an apocalyptic number.

13235513431 is a deficient number, since it is larger than the sum of its proper divisors (2210424089).

13235513431 is an equidigital number, since it uses as much as digits as its factorization.

13235513431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868854 (or 868847 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The spelling of 13235513431 in words is "thirteen billion, two hundred thirty-five million, five hundred thirteen thousand, four hundred thirty-one".