13402331 has 4 divisors (see below), whose sum is σ = 13412832. Its totient is φ = 13391832.

The previous prime is 13402327. The next prime is 13402339. The reversal of 13402331 is 13320431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13402331 - 2² = 13402327 is a prime.

It is a super-2 number, since 2×13402331² = 359244952467122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13402339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020 + ... + 5993.

It is an arithmetic number, because the mean of its divisors is an integer number (3353208).

Almost surely, 2^13402331 is an apocalyptic number.

13402331 is a deficient number, since it is larger than the sum of its proper divisors (10501).

13402331 is an equidigital number, since it uses as much as digits as its factorization.

13402331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500.

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

The square root of 13402331 is about 3660.9194200364. The cubic root of 13402331 is about 237.5345456674.

Adding to 13402331 its reverse (13320431), we get a palindrome (26722762).

The spelling of 13402331 in words is "thirteen million, four hundred two thousand, three hundred thirty-one".