131123231 has 8 divisors (see below), whose sum is σ = 132235824. Its totient is φ = 130014720.

The previous prime is 131123203. The next prime is 131123249. The reversal of 131123231 is 132321131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131123231 - 2¹⁴ = 131106847 is a prime.

It is a super-2 number, since 2×131123231² = 34386603415758722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131123131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107135 + ... + 108351.

It is an arithmetic number, because the mean of its divisors is an integer number (16529478).

Almost surely, 2^131123231 is an apocalyptic number.

131123231 is a deficient number, since it is larger than the sum of its proper divisors (1112593).

131123231 is a wasteful number, since it uses less digits than its factorization.

131123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041.

The product of its digits is 108, while the sum is 17.

The square root of 131123231 is about 11450.9052480579. The cubic root of 131123231 is about 508.0345097663.

Adding to 131123231 its reverse (132321131), we get a palindrome (263444362).

It can be divided in two parts, 1311 and 23231, that added together give a palindrome (24542).

The spelling of 131123231 in words is "one hundred thirty-one million, one hundred twenty-three thousand, two hundred thirty-one".