215332640 has 96 divisors (see below), whose sum is σ = 527446080. Its totient is φ = 83026944.

The previous prime is 215332633. The next prime is 215332657. The reversal of 215332640 is 46233512.

215332640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567971 + ... + 568349.

It is an arithmetic number, because the mean of its divisors is an integer number (5494230).

Almost surely, 2^215332640 is an apocalyptic number.

215332640 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 215332640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263723040).

215332640 is an abundant number, since it is smaller than the sum of its proper divisors (312113440).

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

215332640 is a wasteful number, since it uses less digits than its factorization.

215332640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 215332640 is about 14674.2168445202. The cubic root of 215332640 is about 599.3814365921.

The spelling of 215332640 in words is "two hundred fifteen million, three hundred thirty-two thousand, six hundred forty".