215225616 has 80 divisors (see below), whose sum is σ = 587710400. Its totient is φ = 67682304.

The previous prime is 215225609. The next prime is 215225639. The reversal of 215225616 is 616522512.

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, 372720 + ... + 373296.

It is an arithmetic number, because the mean of its divisors is an integer number (7346380).

Almost surely, 2^215225616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215225616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293855200).

215225616 is an abundant number, since it is smaller than the sum of its proper divisors (372484784).

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

215225616 is a wasteful number, since it uses less digits than its factorization.

215225616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1010 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 215225616 is about 14670.5697230885. The cubic root of 215225616 is about 599.2821191989.

The spelling of 215225616 in words is "two hundred fifteen million, two hundred twenty-five thousand, six hundred sixteen".