131302321 has 2 divisors, whose sum is σ = 131302322. Its totient is φ = 131302320.

The previous prime is 131302313. The next prime is 131302333. The reversal of 131302321 is 123203131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111007296 + 20295025 = 10536^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 131302321 - 2³ = 131302313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131302295 and 131302304.

It is not a weakly prime, because it can be changed into another prime (131302361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65651160 + 65651161.

It is an arithmetic number, because the mean of its divisors is an integer number (65651161).

Almost surely, 2^131302321 is an apocalyptic number.

It is an amenable number.

131302321 is a deficient number, since it is larger than the sum of its proper divisors (1).

131302321 is an equidigital number, since it uses as much as digits as its factorization.

131302321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 131302321 is about 11458.7224855129. The cubic root of 131302321 is about 508.2656981649.

Adding to 131302321 its reverse (123203131), we get a palindrome (254505452).

It can be divided in two parts, 13130 and 2321, that added together give a palindrome (15451).

The spelling of 131302321 in words is "one hundred thirty-one million, three hundred two thousand, three hundred twenty-one".