131132231 has 4 divisors (see below), whose sum is σ = 131157000. Its totient is φ = 131107464.

The previous prime is 131132207. The next prime is 131132291. The reversal of 131132231 is 132231131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131132231 is a prime.

It is a super-2 number, since 2×131132231² = 34391324014074722, 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 (131132291) 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, 881 + ... + 16218.

It is an arithmetic number, because the mean of its divisors is an integer number (32789250).

Almost surely, 2^131132231 is an apocalyptic number.

131132231 is a deficient number, since it is larger than the sum of its proper divisors (24769).

131132231 is an equidigital number, since it uses as much as digits as its factorization.

131132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24768.

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

The square root of 131132231 is about 11451.2982233457. The cubic root of 131132231 is about 508.0461329443.

Adding to 131132231 its reverse (132231131), we get a palindrome (263363362).

The spelling of 131132231 in words is "one hundred thirty-one million, one hundred thirty-two thousand, two hundred thirty-one".