131320155 has 24 divisors (see below), whose sum is σ = 223206192. Its totient is φ = 65915392.

The previous prime is 131320139. The next prime is 131320169. The reversal of 131320155 is 551023131.

It is not a de Polignac number, because 131320155 - 2⁴ = 131320139 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10812 + ... + 19481.

It is an arithmetic number, because the mean of its divisors is an integer number (9300258).

Almost surely, 2^131320155 is an apocalyptic number.

131320155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131320155 is a deficient number, since it is larger than the sum of its proper divisors (91886037).

131320155 is a wasteful number, since it uses less digits than its factorization.

131320155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30335 (or 30318 counting only the distinct ones).

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

The square root of 131320155 is about 11459.5006435708. The cubic root of 131320155 is about 508.2887086749.

Adding to 131320155 its reverse (551023131), we get a palindrome (682343286).

The spelling of 131320155 in words is "one hundred thirty-one million, three hundred twenty thousand, one hundred fifty-five".