55142242 has 8 divisors (see below), whose sum is σ = 85381632. Its totient is φ = 26681700.

The previous prime is 55142239. The next prime is 55142251. The reversal of 55142242 is 24224155.

55142242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 444634 + ... + 444757.

It is an arithmetic number, because the mean of its divisors is an integer number (10672704).

Almost surely, 2^55142242 is an apocalyptic number.

55142242 is a deficient number, since it is larger than the sum of its proper divisors (30239390).

55142242 is a wasteful number, since it uses less digits than its factorization.

55142242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889424.

The product of its digits is 3200, while the sum is 25.

The square root of 55142242 is about 7425.7822483561. The cubic root of 55142242 is about 380.6228060177.

Adding to 55142242 its reverse (24224155), we get a palindrome (79366397).

The spelling of 55142242 in words is "fifty-five million, one hundred forty-two thousand, two hundred forty-two".