215216872120 has 32 divisors (see below), whose sum is σ = 489032406720. Its totient is φ = 85234403200.

The previous prime is 215216872093. The next prime is 215216872127. The reversal of 215216872120 is 21278612512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 215216872120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215216872127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26631712 + ... + 26639791.

It is an arithmetic number, because the mean of its divisors is an integer number (15282262710).

Almost surely, 2^215216872120 is an apocalyptic number.

215216872120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215216872120 is an abundant number, since it is smaller than the sum of its proper divisors (273815534600).

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

215216872120 is a wasteful number, since it uses less digits than its factorization.

215216872120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53271615 (or 53271611 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 215216872120 in words is "two hundred fifteen billion, two hundred sixteen million, eight hundred seventy-two thousand, one hundred twenty".