13551442 has 4 divisors (see below), whose sum is σ = 20327166. Its totient is φ = 6775720.

The previous prime is 13551437. The next prime is 13551449. The reversal of 13551442 is 24415531.

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: 24415531 = 7 ⋅3487933.

It can be written as a sum of positive squares in only one way, i.e., 13549761 + 1681 = 3681^2 + 41^2 .

It is not an unprimeable number, because it can be changed into a prime (13551449) 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 as a sum of consecutive naturals, namely, 3387859 + ... + 3387862.

Almost surely, 2^13551442 is an apocalyptic number.

13551442 is a deficient number, since it is larger than the sum of its proper divisors (6775724).

13551442 is an equidigital number, since it uses as much as digits as its factorization.

13551442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775723.

The product of its digits is 2400, while the sum is 25.

The square root of 13551442 is about 3681.2283276102. The cubic root of 13551442 is about 238.4122155092.

Adding to 13551442 its reverse (24415531), we get a palindrome (37966973).

The spelling of 13551442 in words is "thirteen million, five hundred fifty-one thousand, four hundred forty-two".