55420055 has 16 divisors (see below), whose sum is σ = 71057280. Its totient is φ = 41370912.

The previous prime is 55420049. The next prime is 55420063. The reversal of 55420055 is 55002455.

It is a cyclic number.

It is not a de Polignac number, because 55420055 - 2⁴ = 55420039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2012 + ... + 10718.

It is an arithmetic number, because the mean of its divisors is an integer number (4441080).

Almost surely, 2^55420055 is an apocalyptic number.

55420055 is a deficient number, since it is larger than the sum of its proper divisors (15637225).

55420055 is a wasteful number, since it uses less digits than its factorization.

55420055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8798.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 55420055 is about 7444.4647221946. The cubic root of 55420055 is about 381.2609428016.

The spelling of 55420055 in words is "fifty-five million, four hundred twenty thousand, fifty-five".