2615222220 has 96 divisors (see below), whose sum is σ = 7930379520. Its totient is φ = 640116480.

The previous prime is 2615222213. The next prime is 2615222237. The reversal of 2615222220 is 222225162.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130255 + ... + 148985.

It is an arithmetic number, because the mean of its divisors is an integer number (82608120).

Almost surely, 2^2615222220 is an apocalyptic number.

2615222220 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 2615222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3965189760).

2615222220 is an abundant number, since it is smaller than the sum of its proper divisors (5315157300).

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

2615222220 is a wasteful number, since it uses less digits than its factorization.

2615222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18935 (or 18933 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2615222220 is about 51139.2434437585. The cubic root of 2615222220 is about 1377.7471855031.

Adding to 2615222220 its reverse (222225162), we get a palindrome (2837447382).

The spelling of 2615222220 in words is "two billion, six hundred fifteen million, two hundred twenty-two thousand, two hundred twenty".