2215770320 has 80 divisors (see below), whose sum is σ = 5429331072. Its totient is φ = 839308800.

The previous prime is 2215770301. The next prime is 2215770371. The reversal of 2215770320 is 230775122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2215770320² = 9819276221985804800, which contains 22 as substring.

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, 179879 + ... + 191801.

Almost surely, 2^2215770320 is an apocalyptic number.

2215770320 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 2215770320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2714665536).

2215770320 is an abundant number, since it is smaller than the sum of its proper divisors (3213560752).

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

2215770320 is a wasteful number, since it uses less digits than its factorization.

2215770320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12060 (or 12054 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 2215770320 is about 47071.9695785082. The cubic root of 2215770320 is about 1303.6917390200.

The spelling of 2215770320 in words is "two billion, two hundred fifteen million, seven hundred seventy thousand, three hundred twenty".