13568431 has 4 divisors (see below), whose sum is σ = 14366592. Its totient is φ = 12770272.

The previous prime is 13568419. The next prime is 13568453. The reversal of 13568431 is 13486531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13568431 is a prime.

It is a super-2 number, since 2×13568431² = 368204639603522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13568393 and 13568402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13568461) 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, 399055 + ... + 399088.

It is an arithmetic number, because the mean of its divisors is an integer number (3591648).

Almost surely, 2^13568431 is an apocalyptic number.

13568431 is a deficient number, since it is larger than the sum of its proper divisors (798161).

13568431 is an equidigital number, since it uses as much as digits as its factorization.

13568431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798160.

The product of its digits is 8640, while the sum is 31.

The square root of 13568431 is about 3683.5351226777. The cubic root of 13568431 is about 238.5118037719.

The spelling of 13568431 in words is "thirteen million, five hundred sixty-eight thousand, four hundred thirty-one".