131031123 has 4 divisors (see below), whose sum is σ = 174708168. Its totient is φ = 87354080.

The previous prime is 131031113. The next prime is 131031127. The reversal of 131031123 is 321130131.

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

It is a cyclic number.

It is not a de Polignac number, because 131031123 - 2⁵ = 131031091 is a prime.

It is a super-2 number, since 2×131031123² = 34338310389282258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131031127) 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, 21838518 + ... + 21838523.

It is an arithmetic number, because the mean of its divisors is an integer number (43677042).

Almost surely, 2^131031123 is an apocalyptic number.

131031123 is a deficient number, since it is larger than the sum of its proper divisors (43677045).

131031123 is an equidigital number, since it uses as much as digits as its factorization.

131031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43677044.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131031123 is about 11446.8826760826. The cubic root of 131031123 is about 507.9155249929.

Adding to 131031123 its reverse (321130131), we get a palindrome (452161254).

The spelling of 131031123 in words is "one hundred thirty-one million, thirty-one thousand, one hundred twenty-three".