13431455 has 4 divisors (see below), whose sum is σ = 16117752. Its totient is φ = 10745160.

The previous prime is 13431433. The next prime is 13431497. The reversal of 13431455 is 55413431.

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

It is not a de Polignac number, because 13431455 - 2⁶ = 13431391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343141 + ... + 1343150.

It is an arithmetic number, because the mean of its divisors is an integer number (4029438).

Almost surely, 2^13431455 is an apocalyptic number.

13431455 is a deficient number, since it is larger than the sum of its proper divisors (2686297).

13431455 is an equidigital number, since it uses as much as digits as its factorization.

13431455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686296.

The product of its digits is 3600, while the sum is 26.

The square root of 13431455 is about 3664.8949507455. The cubic root of 13431455 is about 237.7064797167.

Adding to 13431455 its reverse (55413431), we get a palindrome (68844886).

The spelling of 13431455 in words is "thirteen million, four hundred thirty-one thousand, four hundred fifty-five".