13442331 has 16 divisors (see below), whose sum is σ = 20611584. Its totient is φ = 7633344.

The previous prime is 13442323. The next prime is 13442339. The reversal of 13442331 is 13324431.

It is an interprime number because it is at equal distance from previous prime (13442323) and next prime (13442339).

It is not a de Polignac number, because 13442331 - 2³ = 13442323 is a prime.

It is a super-2 number, since 2×13442331² = 361392525427122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13442298 and 13442307.

It is not an unprimeable number, because it can be changed into a prime (13442339) 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 in 15 ways as a sum of consecutive naturals, for example, 1591 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (1288224).

Almost surely, 2^13442331 is an apocalyptic number.

13442331 is a deficient number, since it is larger than the sum of its proper divisors (7169253).

13442331 is a wasteful number, since it uses less digits than its factorization.

13442331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010.

The product of its digits is 864, while the sum is 21.

The square root of 13442331 is about 3666.3784583701. The cubic root of 13442331 is about 237.7706226355.

Adding to 13442331 its reverse (13324431), we get a palindrome (26766762).

The spelling of 13442331 in words is "thirteen million, four hundred forty-two thousand, three hundred thirty-one".