130232321 has 4 divisors (see below), whose sum is σ = 130791492. Its totient is φ = 129673152.

The previous prime is 130232317. The next prime is 130232351. The reversal of 130232321 is 123232031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8439025 + 121793296 = 2905^2 + 11036^2 .

It is a cyclic number.

It is not a de Polignac number, because 130232321 - 2² = 130232317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130232321.

It is not an unprimeable number, because it can be changed into a prime (130232351) 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, 279236 + ... + 279701.

It is an arithmetic number, because the mean of its divisors is an integer number (32697873).

Almost surely, 2^130232321 is an apocalyptic number.

It is an amenable number.

130232321 is a deficient number, since it is larger than the sum of its proper divisors (559171).

130232321 is an equidigital number, since it uses as much as digits as its factorization.

130232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559170.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 130232321 is about 11411.9376531770. The cubic root of 130232321 is about 506.8812892579.

Adding to 130232321 its reverse (123232031), we get a palindrome (253464352).

The spelling of 130232321 in words is "one hundred thirty million, two hundred thirty-two thousand, three hundred twenty-one".