215278120 has 32 divisors (see below), whose sum is σ = 484848000. Its totient is φ = 86027328.

The previous prime is 215278117. The next prime is 215278139. The reversal of 215278120 is 21872512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54037 + ... + 57883.

It is an arithmetic number, because the mean of its divisors is an integer number (15151500).

Almost surely, 2^215278120 is an apocalyptic number.

215278120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215278120 is an abundant number, since it is smaller than the sum of its proper divisors (269569880).

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

215278120 is a wasteful number, since it uses less digits than its factorization.

215278120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257 (or 5253 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 215278120 is about 14672.3590468609. The cubic root of 215278120 is about 599.3308465929.

The spelling of 215278120 in words is "two hundred fifteen million, two hundred seventy-eight thousand, one hundred twenty".