13231137 has 4 divisors (see below), whose sum is σ = 17641520. Its totient is φ = 8820756.

The previous prime is 13231123. The next prime is 13231147. The reversal of 13231137 is 73113231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73113231 = 3 ⋅24371077.

It is not a de Polignac number, because 13231137 - 2¹¹ = 13229089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2205187 + ... + 2205192.

It is an arithmetic number, because the mean of its divisors is an integer number (4410380).

Almost surely, 2^13231137 is an apocalyptic number.

It is an amenable number.

13231137 is a deficient number, since it is larger than the sum of its proper divisors (4410383).

13231137 is an equidigital number, since it uses as much as digits as its factorization.

13231137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410382.

The product of its digits is 378, while the sum is 21.

The square root of 13231137 is about 3637.4629895024. The cubic root of 13231137 is about 236.5188300633.

Adding to 13231137 its reverse (73113231), we get a palindrome (86344368).

The spelling of 13231137 in words is "thirteen million, two hundred thirty-one thousand, one hundred thirty-seven".