131302231 has 4 divisors (see below), whose sum is σ = 131331112. Its totient is φ = 131273352.

The previous prime is 131302229. The next prime is 131302261. The reversal of 131302231 is 132203131.

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

It is a cyclic number.

It is not a de Polignac number, because 131302231 - 2¹ = 131302229 is a prime.

It is a super-2 number, since 2×131302231² = 34480551731154722, 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 (131302211) 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, 5961 + ... + 17266.

It is an arithmetic number, because the mean of its divisors is an integer number (32832778).

Almost surely, 2^131302231 is an apocalyptic number.

131302231 is a deficient number, since it is larger than the sum of its proper divisors (28881).

131302231 is an equidigital number, since it uses as much as digits as its factorization.

131302231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28880.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131302231 is about 11458.7185583729. The cubic root of 131302231 is about 508.2655820361.

Adding to 131302231 its reverse (132203131), we get a palindrome (263505362).

The spelling of 131302231 in words is "one hundred thirty-one million, three hundred two thousand, two hundred thirty-one".