55021850 has 24 divisors (see below), whose sum is σ = 110214300. Its totient is φ = 20315520.

The previous prime is 55021829. The next prime is 55021867. The reversal of 55021850 is 5812055.

It can be written as a sum of positive squares in 6 ways, for example, as 3598609 + 51423241 = 1897^2 + 7171^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41675 + ... + 42974.

Almost surely, 2^55021850 is an apocalyptic number.

55021850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55021850 is an abundant number, since it is smaller than the sum of its proper divisors (55192450).

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

55021850 is a wasteful number, since it uses less digits than its factorization.

55021850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84674 (or 84669 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 55021850 is about 7417.6714675159. The cubic root of 55021850 is about 380.3455997185.

The spelling of 55021850 in words is "fifty-five million, twenty-one thousand, eight hundred fifty".