131313555 has 96 divisors (see below), whose sum is σ = 254951424. Its totient is φ = 64665216.

The previous prime is 131313521. The next prime is 131313587. The reversal of 131313555 is 555313131.

It is not a de Polignac number, because 131313555 - 2²¹ = 129216403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1033902 + ... + 1034028.

It is an arithmetic number, because the mean of its divisors is an integer number (2655744).

Almost surely, 2^131313555 is an apocalyptic number.

131313555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131313555 is a deficient number, since it is larger than the sum of its proper divisors (123637869).

131313555 is a wasteful number, since it uses less digits than its factorization.

131313555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 195 counting only the distinct ones).

The product of its digits is 3375, while the sum is 27.

The square root of 131313555 is about 11459.2126692893. The cubic root of 131313555 is about 508.2801931969.

Adding to 131313555 its reverse (555313131), we get a palindrome (686626686).

The spelling of 131313555 in words is "one hundred thirty-one million, three hundred thirteen thousand, five hundred fifty-five".