13402231 has 4 divisors (see below), whose sum is σ = 13433200. Its totient is φ = 13371264.

The previous prime is 13402229. The next prime is 13402237. The reversal of 13402231 is 13220431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13220431 = 7 ⋅1888633.

It is a cyclic number.

It is not a de Polignac number, because 13402231 - 2¹ = 13402229 is a prime.

It is a super-2 number, since 2×13402231² = 359239591554722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402237) 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, 14826 + ... + 15703.

It is an arithmetic number, because the mean of its divisors is an integer number (3358300).

Almost surely, 2^13402231 is an apocalyptic number.

13402231 is a deficient number, since it is larger than the sum of its proper divisors (30969).

13402231 is an equidigital number, since it uses as much as digits as its factorization.

13402231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30968.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13402231 is about 3660.9057622397. The cubic root of 13402231 is about 237.5339548868.

Adding to 13402231 its reverse (13220431), we get a palindrome (26622662).

The spelling of 13402231 in words is "thirteen million, four hundred two thousand, two hundred thirty-one".