131322155 has 4 divisors (see below), whose sum is σ = 157586592. Its totient is φ = 105057720.

The previous prime is 131322151. The next prime is 131322187. The reversal of 131322155 is 551223131.

It is a happy number.

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

It is not a de Polignac number, because 131322155 - 2² = 131322151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131322155.

It is not an unprimeable number, because it can be changed into a prime (131322151) 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, 13132211 + ... + 13132220.

It is an arithmetic number, because the mean of its divisors is an integer number (39396648).

Almost surely, 2^131322155 is an apocalyptic number.

131322155 is a deficient number, since it is larger than the sum of its proper divisors (26264437).

131322155 is an equidigital number, since it uses as much as digits as its factorization.

131322155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26264436.

The product of its digits is 900, while the sum is 23.

The square root of 131322155 is about 11459.5879070759. The cubic root of 131322155 is about 508.2912890664.

Adding to 131322155 its reverse (551223131), we get a palindrome (682545286).

The spelling of 131322155 in words is "one hundred thirty-one million, three hundred twenty-two thousand, one hundred fifty-five".