13020331 has 2 divisors, whose sum is σ = 13020332. Its totient is φ = 13020330.

The previous prime is 13020307. The next prime is 13020347. The reversal of 13020331 is 13302031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13020331 is a prime.

It is a super-2 number, since 2×13020331² = 339058038699122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13020361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510165 + 6510166.

It is an arithmetic number, because the mean of its divisors is an integer number (6510166).

Almost surely, 2^13020331 is an apocalyptic number.

13020331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13020331 is an equidigital number, since it uses as much as digits as its factorization.

13020331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 13020331 is about 3608.3695764154. The cubic root of 13020331 is about 235.2559818133.

Adding to 13020331 its reverse (13302031), we get a palindrome (26322362).

The spelling of 13020331 in words is "thirteen million, twenty thousand, three hundred thirty-one".