13831357 has 4 divisors (see below), whose sum is σ = 14092380. Its totient is φ = 13570336.

The previous prime is 13831351. The next prime is 13831361. The reversal of 13831357 is 75313831.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8696601 + 5134756 = 2949^2 + 2266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13831357 is a prime.

It is a super-2 number, since 2×13831357² = 382612872922898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13831351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130432 + ... + 130537.

It is an arithmetic number, because the mean of its divisors is an integer number (3523095).

Almost surely, 2^13831357 is an apocalyptic number.

It is an amenable number.

13831357 is a deficient number, since it is larger than the sum of its proper divisors (261023).

13831357 is an equidigital number, since it uses as much as digits as its factorization.

13831357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261022.

The product of its digits is 7560, while the sum is 31.

The square root of 13831357 is about 3719.0532397372. The cubic root of 13831357 is about 240.0425676810.

The spelling of 13831357 in words is "thirteen million, eight hundred thirty-one thousand, three hundred fifty-seven".