131631123 has 16 divisors (see below), whose sum is σ = 189481376. Its totient is φ = 80801280.

The previous prime is 131631023. The next prime is 131631131. The reversal of 131631123 is 321136131.

It is not a de Polignac number, because 131631123 - 2¹⁷ = 131500051 is a prime.

It is a super-2 number, since 2×131631123² = 34653505084482258, which contains 22 as substring.

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 131631123.

It is not an unprimeable number, because it can be changed into a prime (131631133) 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, 12411 + ... + 20427.

It is an arithmetic number, because the mean of its divisors is an integer number (11842586).

Almost surely, 2^131631123 is an apocalyptic number.

131631123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131631123 is a deficient number, since it is larger than the sum of its proper divisors (57850253).

131631123 is a wasteful number, since it uses less digits than its factorization.

131631123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8454.

The product of its digits is 324, while the sum is 21.

The square root of 131631123 is about 11473.0607511684. The cubic root of 131631123 is about 508.6896040364.

Adding to 131631123 its reverse (321136131), we get a palindrome (452767254).

The spelling of 131631123 in words is "one hundred thirty-one million, six hundred thirty-one thousand, one hundred twenty-three".