55007442 has 48 divisors (see below), whose sum is σ = 136648512. Its totient is φ = 15665760.

The previous prime is 55007431. The next prime is 55007479. The reversal of 55007442 is 24470055.

55007442 is a `hidden beast` number, since 550 + 0 + 74 + 42 = 666.

55007442 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 23 ways as a sum of consecutive naturals, for example, 57613 + ... + 58559.

It is an arithmetic number, because the mean of its divisors is an integer number (2846844).

Almost surely, 2^55007442 is an apocalyptic number.

55007442 is an abundant number, since it is smaller than the sum of its proper divisors (81641070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55007442 is a wasteful number, since it uses less digits than its factorization.

55007442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 55007442 is about 7416.7002096620. The cubic root of 55007442 is about 380.3123977706.

Adding to 55007442 its reverse (24470055), we get a palindrome (79477497).

The spelling of 55007442 in words is "fifty-five million, seven thousand, four hundred forty-two".