13199431 has 4 divisors (see below), whose sum is σ = 15085072. Its totient is φ = 11313792.

The previous prime is 13199423. The next prime is 13199443. The reversal of 13199431 is 13499131.

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

It is not a de Polignac number, because 13199431 - 2³ = 13199423 is a prime.

It is a super-2 number, since 2×13199431² = 348449957447522, 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 = 13199393 and 13199402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13199411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942810 + ... + 942823.

It is an arithmetic number, because the mean of its divisors is an integer number (3771268).

Almost surely, 2^13199431 is an apocalyptic number.

13199431 is a deficient number, since it is larger than the sum of its proper divisors (1885641).

13199431 is an equidigital number, since it uses as much as digits as its factorization.

13199431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885640.

The product of its digits is 2916, while the sum is 31.

The square root of 13199431 is about 3633.1021180253. The cubic root of 13199431 is about 236.3297542477.

The spelling of 13199431 in words is "thirteen million, one hundred ninety-nine thousand, four hundred thirty-one".