2215500000 has 336 divisors, whose sum is σ = 8347393152. Its totient is φ = 504000000.

The previous prime is 2215499999. The next prime is 2215500017. The reversal of 2215500000 is 55122.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 10499895 + ... + 10500105.

It is an arithmetic number, because the mean of its divisors is an integer number (24843432).

Almost surely, 2^2215500000 is an apocalyptic number.

2215500000 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 2215500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4173696576).

2215500000 is an abundant number, since it is smaller than the sum of its proper divisors (6131893152).

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

2215500000 is an frugal number, since it uses more digits than its factorization.

2215500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 2215500000 is about 47069.0981430492. The cubic root of 2215500000 is about 1303.6387208469.

Adding to 2215500000 its reverse (55122), we get a palindrome (2215555122).

The spelling of 2215500000 in words is "two billion, two hundred fifteen million, five hundred thousand".