13431357 has 12 divisors (see below), whose sum is σ = 19457724. Its totient is φ = 8928000.

The previous prime is 13431349. The next prime is 13431359. The reversal of 13431357 is 75313431.

It can be written as a sum of positive squares in 2 ways, for example, as 3261636 + 10169721 = 1806^2 + 3189^2 .

It is not a de Polignac number, because 13431357 - 2³ = 13431349 is a prime.

It is a super-2 number, since 2×13431357² = 360802701722898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13431357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431359) 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, 1357 + ... + 5357.

It is an arithmetic number, because the mean of its divisors is an integer number (1621477).

Almost surely, 2^13431357 is an apocalyptic number.

It is an amenable number.

13431357 is a deficient number, since it is larger than the sum of its proper divisors (6026367).

13431357 is a wasteful number, since it uses less digits than its factorization.

13431357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380 (or 4377 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 13431357 is about 3664.8815806244. The cubic root of 13431357 is about 237.7059015889.

Adding to 13431357 its reverse (75313431), we get a palindrome (88744788).

The spelling of 13431357 in words is "thirteen million, four hundred thirty-one thousand, three hundred fifty-seven".