215202782120 has 16 divisors (see below), whose sum is σ = 484206259860. Its totient is φ = 86081112832.

The previous prime is 215202782117. The next prime is 215202782131. The reversal of 215202782120 is 21287202512.

215202782120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 183374081284 + 31828700836 = 428222^2 + 178406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690034737 + ... + 2690034816.

Almost surely, 2^215202782120 is an apocalyptic number.

215202782120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215202782120 is an abundant number, since it is smaller than the sum of its proper divisors (269003477740).

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

215202782120 is a wasteful number, since it uses less digits than its factorization.

215202782120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5380069564 (or 5380069560 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

Adding to 215202782120 its reverse (21287202512), we get a palindrome (236489984632).

The spelling of 215202782120 in words is "two hundred fifteen billion, two hundred two million, seven hundred eighty-two thousand, one hundred twenty".