13831057 has 8 divisors (see below), whose sum is σ = 14351400. Its totient is φ = 13313664.

The previous prime is 13831049. The next prime is 13831067. The reversal of 13831057 is 75013831.

It can be written as a sum of positive squares in 4 ways, for example, as 1185921 + 12645136 = 1089^2 + 3556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13831057 - 2³ = 13831049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13831067) 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 7 ways as a sum of consecutive naturals, for example, 14293 + ... + 15229.

It is an arithmetic number, because the mean of its divisors is an integer number (1793925).

Almost surely, 2^13831057 is an apocalyptic number.

It is an amenable number.

13831057 is a deficient number, since it is larger than the sum of its proper divisors (520343).

13831057 is an equidigital number, since it uses as much as digits as its factorization.

13831057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 13831057 is about 3719.0129066730. The cubic root of 13831057 is about 240.0408321730.

Adding to 13831057 its reverse (75013831), we get a palindrome (88844888).

The spelling of 13831057 in words is "thirteen million, eight hundred thirty-one thousand, fifty-seven".