55420842 has 16 divisors (see below), whose sum is σ = 111304512. Its totient is φ = 18396480.

The previous prime is 55420837. The next prime is 55420873. The reversal of 55420842 is 24802455.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17718 + ... + 20609.

It is an arithmetic number, because the mean of its divisors is an integer number (6956532).

Almost surely, 2^55420842 is an apocalyptic number.

55420842 is an abundant number, since it is smaller than the sum of its proper divisors (55883670).

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

55420842 is a wasteful number, since it uses less digits than its factorization.

55420842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38573.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 55420842 is about 7444.5175800719. The cubic root of 55420842 is about 381.2627475089.

The spelling of 55420842 in words is "fifty-five million, four hundred twenty thousand, eight hundred forty-two".