2215055100 has 72 divisors (see below), whose sum is σ = 6435695728. Its totient is φ = 588211200.

The previous prime is 2215055083. The next prime is 2215055123. The reversal of 2215055100 is 15505122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56982 + ... + 87618.

Almost surely, 2^2215055100 is an apocalyptic number.

2215055100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2215055100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3217847864).

2215055100 is an abundant number, since it is smaller than the sum of its proper divisors (4220640628).

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

2215055100 is a wasteful number, since it uses less digits than its factorization.

2215055100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30895 (or 30888 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 2215055100 is about 47064.3718751244. The cubic root of 2215055100 is about 1303.5514527066.

The spelling of 2215055100 in words is "two billion, two hundred fifteen million, fifty-five thousand, one hundred".