55554220 has 24 divisors (see below), whose sum is σ = 117369504. Its totient is φ = 22087296.

The previous prime is 55554217. The next prime is 55554251. The reversal of 55554220 is 2245555.

It is a nialpdrome in base 10.

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, 4977 + ... + 11656.

It is an arithmetic number, because the mean of its divisors is an integer number (4890396).

Almost surely, 2^55554220 is an apocalyptic number.

It is an amenable number.

55554220 is an abundant number, since it is smaller than the sum of its proper divisors (61815284).

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

55554220 is a wasteful number, since it uses less digits than its factorization.

55554220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16809 (or 16807 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55554220 is about 7453.4703326705. The cubic root of 55554220 is about 381.5683565010.

Adding to 55554220 its reverse (2245555), we get a palindrome (57799775).

The spelling of 55554220 in words is "fifty-five million, five hundred fifty-four thousand, two hundred twenty".