13213442 has 12 divisors (see below), whose sum is σ = 21786198. Its totient is φ = 6006000.

The previous prime is 13213441. The next prime is 13213451. The reversal of 13213442 is 24431231.

It can be written as a sum of positive squares in only one way, i.e., 13097161 + 116281 = 3619^2 + 341^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13213441) 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 5 ways as a sum of consecutive naturals, for example, 27059 + ... + 27542.

Almost surely, 2^13213442 is an apocalyptic number.

13213442 is a deficient number, since it is larger than the sum of its proper divisors (8572756).

13213442 is a wasteful number, since it uses less digits than its factorization.

13213442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54625 (or 54614 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 13213442 is about 3635.0298485707. The cubic root of 13213442 is about 236.4133448528.

Adding to 13213442 its reverse (24431231), we get a palindrome (37644673).

The spelling of 13213442 in words is "thirteen million, two hundred thirteen thousand, four hundred forty-two".