131240555 has 4 divisors (see below), whose sum is σ = 157488672. Its totient is φ = 104992440.

The previous prime is 131240537. The next prime is 131240563. The reversal of 131240555 is 555042131.

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

It is not a de Polignac number, because 131240555 - 2⁶ = 131240491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13124051 + ... + 13124060.

It is an arithmetic number, because the mean of its divisors is an integer number (39372168).

Almost surely, 2^131240555 is an apocalyptic number.

131240555 is a deficient number, since it is larger than the sum of its proper divisors (26248117).

131240555 is an equidigital number, since it uses as much as digits as its factorization.

131240555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26248116.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 131240555 is about 11456.0270163788. The cubic root of 131240555 is about 508.1859878120.

Adding to 131240555 its reverse (555042131), we get a palindrome (686282686).

The spelling of 131240555 in words is "one hundred thirty-one million, two hundred forty thousand, five hundred fifty-five".