13403331 has 6 divisors (see below), whose sum is σ = 19360380. Its totient is φ = 8935548.

The previous prime is 13403323. The next prime is 13403333. The reversal of 13403331 is 13330431.

It is not a de Polignac number, because 13403331 - 2³ = 13403323 is a prime.

It is a super-2 number, since 2×13403331² = 359298563791122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13403333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 744621 + ... + 744638.

It is an arithmetic number, because the mean of its divisors is an integer number (3226730).

Almost surely, 2^13403331 is an apocalyptic number.

13403331 is a deficient number, since it is larger than the sum of its proper divisors (5957049).

13403331 is a wasteful number, since it uses less digits than its factorization.

13403331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489265 (or 1489262 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 13403331 is about 3661.0559952014. The cubic root of 13403331 is about 237.5404533123.

Adding to 13403331 its reverse (13330431), we get a palindrome (26733762).

Subtracting from 13403331 its reverse (13330431), we obtain a square (72900 = 270²).

The spelling of 13403331 in words is "thirteen million, four hundred three thousand, three hundred thirty-one".