2190915220 has 48 divisors (see below), whose sum is σ = 4990567680. Its totient is φ = 803120256.

The previous prime is 2190915211. The next prime is 2190915253. The reversal of 2190915220 is 225190912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5829 + ... + 66451.

It is an arithmetic number, because the mean of its divisors is an integer number (103970160).

Almost surely, 2^2190915220 is an apocalyptic number.

2190915220 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 2190915220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495283840).

2190915220 is an abundant number, since it is smaller than the sum of its proper divisors (2799652460).

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

2190915220 is a wasteful number, since it uses less digits than its factorization.

2190915220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60784 (or 60782 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 2190915220 is about 46807.2133329896. The cubic root of 2190915220 is about 1298.7987364695.

The spelling of 2190915220 in words is "two billion, one hundred ninety million, nine hundred fifteen thousand, two hundred twenty".