2152215220 has 12 divisors (see below), whose sum is σ = 4519652004. Its totient is φ = 860886080.

The previous prime is 2152215203. The next prime is 2152215259. The reversal of 2152215220 is 225122512.

It can be written as a sum of positive squares in 2 ways, for example, as 268828816 + 1883386404 = 16396^2 + 43398^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2152215191 and 2152215200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53805361 + ... + 53805400.

It is an arithmetic number, because the mean of its divisors is an integer number (376637667).

Almost surely, 2^2152215220 is an apocalyptic number.

2152215220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2152215220 is an abundant number, since it is smaller than the sum of its proper divisors (2367436784).

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

2152215220 is a wasteful number, since it uses less digits than its factorization.

2152215220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107610770 (or 107610768 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2152215220 is about 46391.9736592441. The cubic root of 2152215220 is about 1291.1060001847.

Adding to 2152215220 its reverse (225122512), we get a palindrome (2377337732).

The spelling of 2152215220 in words is "two billion, one hundred fifty-two million, two hundred fifteen thousand, two hundred twenty".