131131133 has 4 divisors (see below), whose sum is σ = 149864160. Its totient is φ = 112398108.

The previous prime is 131131129. The next prime is 131131177. The reversal of 131131133 is 331131131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331131131 = 97 ⋅3413723.

It is a cyclic number.

It is not a de Polignac number, because 131131133 - 2² = 131131129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131131193) 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, 9366503 + ... + 9366516.

It is an arithmetic number, because the mean of its divisors is an integer number (37466040).

Almost surely, 2^131131133 is an apocalyptic number.

It is an amenable number.

131131133 is a deficient number, since it is larger than the sum of its proper divisors (18733027).

131131133 is an equidigital number, since it uses as much as digits as its factorization.

131131133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18733026.

The product of its digits is 81, while the sum is 17.

The square root of 131131133 is about 11451.2502810828. The cubic root of 131131133 is about 508.0447149451.

Adding to 131131133 its reverse (331131131), we get a palindrome (462262264).

The spelling of 131131133 in words is "one hundred thirty-one million, one hundred thirty-one thousand, one hundred thirty-three".