131541555 has 16 divisors (see below), whose sum is σ = 212833440. Its totient is φ = 69366528.

The previous prime is 131541499. The next prime is 131541589. The reversal of 131541555 is 555145131.

It is not a de Polignac number, because 131541555 - 2⁹ = 131541043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47932 + ... + 50601.

It is an arithmetic number, because the mean of its divisors is an integer number (13302090).

Almost surely, 2^131541555 is an apocalyptic number.

131541555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131541555 is a deficient number, since it is larger than the sum of its proper divisors (81291885).

131541555 is an equidigital number, since it uses as much as digits as its factorization.

131541555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98630.

The product of its digits is 7500, while the sum is 30.

The square root of 131541555 is about 11469.1566821628. The cubic root of 131541555 is about 508.5741990887.

Adding to 131541555 its reverse (555145131), we get a palindrome (686686686).

The spelling of 131541555 in words is "one hundred thirty-one million, five hundred forty-one thousand, five hundred fifty-five".