55315442 has 16 divisors (see below), whose sum is σ = 102121152. Its totient is φ = 21882960.

The previous prime is 55315427. The next prime is 55315451. The reversal of 55315442 is 24451355.

55315442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 151784 + ... + 152147.

It is an arithmetic number, because the mean of its divisors is an integer number (6382572).

Almost surely, 2^55315442 is an apocalyptic number.

55315442 is a deficient number, since it is larger than the sum of its proper divisors (46805710).

55315442 is a wasteful number, since it uses less digits than its factorization.

55315442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303953.

The product of its digits is 12000, while the sum is 29.

The square root of 55315442 is about 7437.4351761881. The cubic root of 55315442 is about 381.0208974882.

Adding to 55315442 its reverse (24451355), we get a palindrome (79766797).

The spelling of 55315442 in words is "fifty-five million, three hundred fifteen thousand, four hundred forty-two".