131323123 has 16 divisors (see below), whose sum is σ = 143410176. Its totient is φ = 119901760.

The previous prime is 131323111. The next prime is 131323141. The reversal of 131323123 is 321323131.

It is not a de Polignac number, because 131323123 - 2¹⁷ = 131192051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131323123.

It is not an unprimeable number, because it can be changed into a prime (131323103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42840 + ... + 45802.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^131323123 is an apocalyptic number.

131323123 is a deficient number, since it is larger than the sum of its proper divisors (12087053).

131323123 is a wasteful number, since it uses less digits than its factorization.

131323123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074.

The product of its digits is 324, while the sum is 19.

The square root of 131323123 is about 11459.6301423737. The cubic root of 131323123 is about 508.2925379665.

Adding to 131323123 its reverse (321323131), we get a palindrome (452646254).

The spelling of 131323123 in words is "one hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-three".