2215915600 has 60 divisors (see below), whose sum is σ = 5330240316. Its totient is φ = 885283840.

The previous prime is 2215915591. The next prime is 2215915601. The reversal of 2215915600 is 65195122.

It can be written as a sum of positive squares in 6 ways, for example, as 15555136 + 2200360464 = 3944^2 + 46908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215915601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378294 + ... + 384106.

Almost surely, 2^2215915600 is an apocalyptic number.

2215915600 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 2215915600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2665120158).

2215915600 is an abundant number, since it is smaller than the sum of its proper divisors (3114324716).

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

2215915600 is a wasteful number, since it uses less digits than its factorization.

2215915600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784 (or 6773 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 2215915600 is about 47073.5127221243. The cubic root of 2215915600 is about 1303.7202311723.

The spelling of 2215915600 in words is "two billion, two hundred fifteen million, nine hundred fifteen thousand, six hundred".