131323155 has 32 divisors (see below), whose sum is σ = 222393600. Its totient is φ = 65987712.

The previous prime is 131323151. The next prime is 131323189. The reversal of 131323155 is 551323131.

It is not a de Polignac number, because 131323155 - 2² = 131323151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131323151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54976 + ... + 57314.

It is an arithmetic number, because the mean of its divisors is an integer number (6949800).

Almost surely, 2^131323155 is an apocalyptic number.

131323155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131323155 is a deficient number, since it is larger than the sum of its proper divisors (91070445).

131323155 is a wasteful number, since it uses less digits than its factorization.

131323155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563.

The product of its digits is 1350, while the sum is 24.

The square root of 131323155 is about 11459.6315385792. The cubic root of 131323155 is about 508.2925792524.

Subtracting from 131323155 its sum of digits (24), we obtain a palindrome (131323131).

Adding to 131323155 its reverse (551323131), we get a palindrome (682646286).

The spelling of 131323155 in words is "one hundred thirty-one million, three hundred twenty-three thousand, one hundred fifty-five".