13231155 has 16 divisors (see below), whose sum is σ = 24194304. Its totient is φ = 6048480.

The previous prime is 13231147. The next prime is 13231159. The reversal of 13231155 is 55113231.

13231155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13231155 - 2³ = 13231147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13231159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62901 + ... + 63110.

It is an arithmetic number, because the mean of its divisors is an integer number (1512144).

Almost surely, 2^13231155 is an apocalyptic number.

13231155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13231155 is a deficient number, since it is larger than the sum of its proper divisors (10963149).

13231155 is a wasteful number, since it uses less digits than its factorization.

13231155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126026.

The product of its digits is 450, while the sum is 21.

The square root of 13231155 is about 3637.4654637536. The cubic root of 13231155 is about 236.5189373188.

Adding to 13231155 its reverse (55113231), we get a palindrome (68344386).

The spelling of 13231155 in words is "thirteen million, two hundred thirty-one thousand, one hundred fifty-five".