215921248 has 24 divisors (see below), whose sum is σ = 425467728. Its totient is φ = 107865984.

The previous prime is 215921239. The next prime is 215921347. The reversal of 215921248 is 842129512.

215921248 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47190 + ... + 51562.

It is an arithmetic number, because the mean of its divisors is an integer number (17727822).

Almost surely, 2^215921248 is an apocalyptic number.

It is an amenable number.

215921248 is a deficient number, since it is larger than the sum of its proper divisors (209546480).

215921248 is a wasteful number, since it uses less digits than its factorization.

215921248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926 (or 5918 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 215921248 is about 14694.2590150031. The cubic root of 215921248 is about 599.9270726178.

The spelling of 215921248 in words is "two hundred fifteen million, nine hundred twenty-one thousand, two hundred forty-eight".