131110405 has 4 divisors (see below), whose sum is σ = 157332492. Its totient is φ = 104888320.

The previous prime is 131110391. The next prime is 131110429. The reversal of 131110405 is 504011131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504011131 = 13 ⋅38770087.

It can be written as a sum of positive squares in 2 ways, for example, as 27029601 + 104080804 = 5199^2 + 10202^2 .

It is a de Polignac number, because none of the positive numbers 2^k-131110405 is a prime.

It is a Duffinian number.

It is a congruent 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, 13111036 + ... + 13111045.

It is an arithmetic number, because the mean of its divisors is an integer number (39333123).

Almost surely, 2^131110405 is an apocalyptic number.

It is an amenable number.

131110405 is a deficient number, since it is larger than the sum of its proper divisors (26222087).

131110405 is an equidigital number, since it uses as much as digits as its factorization.

131110405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26222086.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 131110405 is about 11450.3451913032. The cubic root of 131110405 is about 508.0179445270.

Adding to 131110405 its reverse (504011131), we get a palindrome (635121536).

The spelling of 131110405 in words is "one hundred thirty-one million, one hundred ten thousand, four hundred five".