215720716 has 6 divisors (see below), whose sum is σ = 377511260. Its totient is φ = 107860356.

The previous prime is 215720689. The next prime is 215720717. The reversal of 215720716 is 617027512.

215720716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215720717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26965086 + ... + 26965093.

Almost surely, 2^215720716 is an apocalyptic number.

It is an amenable number.

215720716 is a deficient number, since it is larger than the sum of its proper divisors (161790544).

215720716 is a wasteful number, since it uses less digits than its factorization.

215720716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53930183 (or 53930181 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 215720716 is about 14687.4339487877. The cubic root of 215720716 is about 599.7412921702.

The spelling of 215720716 in words is "two hundred fifteen million, seven hundred twenty thousand, seven hundred sixteen".