2215572090 has 64 divisors (see below), whose sum is σ = 5646309120. Its totient is φ = 554470400.

The previous prime is 2215572061. The next prime is 2215572097. The reversal of 2215572090 is 902755122.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2215572097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177040 + ... + 189140.

It is an arithmetic number, because the mean of its divisors is an integer number (88223580).

Almost surely, 2^2215572090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2215572090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2823154560).

2215572090 is an abundant number, since it is smaller than the sum of its proper divisors (3430737030).

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

2215572090 is a wasteful number, since it uses less digits than its factorization.

2215572090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12487.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 2215572090 is about 47069.8639258709. The cubic root of 2215572090 is about 1303.6528603633.

The spelling of 2215572090 in words is "two billion, two hundred fifteen million, five hundred seventy-two thousand, ninety".