55058220 has 144 divisors (see below), whose sum is σ = 196193088. Its totient is φ = 12234240.

The previous prime is 55058177. The next prime is 55058221. The reversal of 55058220 is 2285055.

It is not an unprimeable number, because it can be changed into a prime (55058221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46030 + ... + 47210.

It is an arithmetic number, because the mean of its divisors is an integer number (1362452).

Almost surely, 2^55058220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55058220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98096544).

55058220 is an abundant number, since it is smaller than the sum of its proper divisors (141134868).

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

55058220 is a wasteful number, since it uses less digits than its factorization.

55058220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 55058220 is about 7420.1226404959. The cubic root of 55058220 is about 380.4293853578.

It can be divided in two parts, 55058 and 220, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 55058220 in words is "fifty-five million, fifty-eight thousand, two hundred twenty".