131135555 has 4 divisors (see below), whose sum is σ = 157362672. Its totient is φ = 104908440.

The previous prime is 131135551. The next prime is 131135567. The reversal of 131135555 is 555531131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555531131 = 1901 ⋅292231.

It is not a de Polignac number, because 131135555 - 2² = 131135551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131135551) 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, 13113551 + ... + 13113560.

It is an arithmetic number, because the mean of its divisors is an integer number (39340668).

Almost surely, 2^131135555 is an apocalyptic number.

131135555 is a deficient number, since it is larger than the sum of its proper divisors (26227117).

131135555 is an equidigital number, since it uses as much as digits as its factorization.

131135555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26227116.

The product of its digits is 5625, while the sum is 29.

The square root of 131135555 is about 11451.4433588085. The cubic root of 131135555 is about 508.0504256370.

Adding to 131135555 its reverse (555531131), we get a palindrome (686666686).

The spelling of 131135555 in words is "one hundred thirty-one million, one hundred thirty-five thousand, five hundred fifty-five".