130331231 has 4 divisors (see below), whose sum is σ = 137997792. Its totient is φ = 122664672.

The previous prime is 130331219. The next prime is 130331239. The reversal of 130331231 is 132133031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132133031 = 37 ⋅3571163.

It is a cyclic number.

It is not a de Polignac number, because 130331231 - 2⁶ = 130331167 is a prime.

It is a super-2 number, since 2×130331231² = 33972459547950722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7666543 = 130331231 / (1 + 3 + 0 + 3 + 3 + 1 + 2 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130331239) 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, 3833255 + ... + 3833288.

It is an arithmetic number, because the mean of its divisors is an integer number (34499448).

Almost surely, 2^130331231 is an apocalyptic number.

130331231 is a deficient number, since it is larger than the sum of its proper divisors (7666561).

130331231 is an equidigital number, since it uses as much as digits as its factorization.

130331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666560.

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

The square root of 130331231 is about 11416.2704505456. The cubic root of 130331231 is about 507.0095803529.

Adding to 130331231 its reverse (132133031), we get a palindrome (262464262).

The spelling of 130331231 in words is "one hundred thirty million, three hundred thirty-one thousand, two hundred thirty-one".