13431771 has 8 divisors (see below), whose sum is σ = 19898960. Its totient is φ = 8954496.

The previous prime is 13431767. The next prime is 13431787. The reversal of 13431771 is 17713431.

13431771 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13431771 - 2² = 13431767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 497473 = 13431771 / (1 + 3 + 4 + 3 + 1 + 7 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13431721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248710 + ... + 248763.

It is an arithmetic number, because the mean of its divisors is an integer number (2487370).

Almost surely, 2^13431771 is an apocalyptic number.

13431771 is a deficient number, since it is larger than the sum of its proper divisors (6467189).

13431771 is an equidigital number, since it uses as much as digits as its factorization.

13431771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497482 (or 497476 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 13431771 is about 3664.9380622324. The cubic root of 13431771 is about 237.7083438647.

It can be divided in two parts, 13431 and 771, that multiplied together give a palindrome (10355301).

The spelling of 13431771 in words is "thirteen million, four hundred thirty-one thousand, seven hundred seventy-one".