2215739880 has 384 divisors, whose sum is σ = 8134272000. Its totient is φ = 535818240.

The previous prime is 2215739861. The next prime is 2215739881. The reversal of 2215739880 is 889375122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215739881) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9675606 + ... + 9675834.

It is an arithmetic number, because the mean of its divisors is an integer number (21183000).

Almost surely, 2^2215739880 is an apocalyptic number.

2215739880 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 2215739880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4067136000).

2215739880 is an abundant number, since it is smaller than the sum of its proper divisors (5918532120).

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

2215739880 is a wasteful number, since it uses less digits than its factorization.

2215739880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 2215739880 is about 47071.6462427224. The cubic root of 2215739880 is about 1303.6857690031.

The spelling of 2215739880 in words is "two billion, two hundred fifteen million, seven hundred thirty-nine thousand, eight hundred eighty".