131330231 has 4 divisors (see below), whose sum is σ = 131353152. Its totient is φ = 131307312.

The previous prime is 131330201. The next prime is 131330273. The reversal of 131330231 is 132033131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 132033131 = 37 ⋅3568463.

It is a cyclic number.

It is not a de Polignac number, because 131330231 - 2¹⁰ = 131329207 is a prime.

It is a super-2 number, since 2×131330231² = 34495259149026722, 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 (131330201) 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, 5675 + ... + 17171.

It is an arithmetic number, because the mean of its divisors is an integer number (32838288).

Almost surely, 2^131330231 is an apocalyptic number.

131330231 is a deficient number, since it is larger than the sum of its proper divisors (22921).

131330231 is a wasteful number, since it uses less digits than its factorization.

131330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22920.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131330231 is about 11459.9402703505. The cubic root of 131330231 is about 508.3017084210.

Adding to 131330231 its reverse (132033131), we get a palindrome (263363362).

The spelling of 131330231 in words is "one hundred thirty-one million, three hundred thirty thousand, two hundred thirty-one".