55420042 has 8 divisors (see below), whose sum is σ = 83437632. Its totient is φ = 27607500.

The previous prime is 55420039. The next prime is 55420049. The reversal of 55420042 is 24002455.

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

It is a junction number, because it is equal to n+sod(n) for n = 55419995 and 55420022.

It is not an unprimeable number, because it can be changed into a prime (55420049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50584 + ... + 51667.

It is an arithmetic number, because the mean of its divisors is an integer number (10429704).

Almost surely, 2^55420042 is an apocalyptic number.

55420042 is a deficient number, since it is larger than the sum of its proper divisors (28017590).

55420042 is a wasteful number, since it uses less digits than its factorization.

55420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102524.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 55420042 is about 7444.4638490626. The cubic root of 55420042 is about 381.2609129905.

Adding to 55420042 its reverse (24002455), we get a palindrome (79422497).

The spelling of 55420042 in words is "fifty-five million, four hundred twenty thousand, forty-two".