13330431 has 24 divisors (see below), whose sum is σ = 20558304. Its totient is φ = 8294400.

The previous prime is 13330423. The next prime is 13330439. The reversal of 13330431 is 13403331.

It is an interprime number because it is at equal distance from previous prime (13330423) and next prime (13330439).

It is not a de Polignac number, because 13330431 - 2³ = 13330423 is a prime.

It is a super-2 number, since 2×13330431² = 355400781291522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13330439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22815 + ... + 23391.

It is an arithmetic number, because the mean of its divisors is an integer number (856596).

Almost surely, 2^13330431 is an apocalyptic number.

13330431 is a deficient number, since it is larger than the sum of its proper divisors (7227873).

13330431 is a wasteful number, since it uses less digits than its factorization.

13330431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 748 counting only the distinct ones).

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

The square root of 13330431 is about 3651.0862767127. The cubic root of 13330431 is about 237.1090135675.

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

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

The spelling of 13330431 in words is "thirteen million, three hundred thirty thousand, four hundred thirty-one".