13420331 has 2 divisors, whose sum is σ = 13420332. Its totient is φ = 13420330.

The previous prime is 13420321. The next prime is 13420387. The reversal of 13420331 is 13302431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13420331 - 2²² = 9226027 is a prime.

It is a super-2 number, since 2×13420331² = 360210568299122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13420321) 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, 6710165 + 6710166.

It is an arithmetic number, because the mean of its divisors is an integer number (6710166).

Almost surely, 2^13420331 is an apocalyptic number.

13420331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13420331 is an equidigital number, since it uses as much as digits as its factorization.

13420331 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13420331 is about 3663.3769939770. The cubic root of 13420331 is about 237.6408383495.

Adding to 13420331 its reverse (13302431), we get a palindrome (26722762).

The spelling of 13420331 in words is "thirteen million, four hundred twenty thousand, three hundred thirty-one".