215439968 has 24 divisors (see below), whose sum is σ = 424515168. Its totient is φ = 107626624.

The previous prime is 215439967. The next prime is 215439971. The reversal of 215439968 is 869934512.

215439968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215439967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48530 + ... + 52782.

It is an arithmetic number, because the mean of its divisors is an integer number (17688132).

Almost surely, 2^215439968 is an apocalyptic number.

It is an amenable number.

215439968 is a deficient number, since it is larger than the sum of its proper divisors (209075200).

215439968 is a wasteful number, since it uses less digits than its factorization.

215439968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846 (or 5838 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 215439968 is about 14677.8734154509. The cubic root of 215439968 is about 599.4810030516.

The spelling of 215439968 in words is "two hundred fifteen million, four hundred thirty-nine thousand, nine hundred sixty-eight".