215797268 has 12 divisors (see below), whose sum is σ = 386856372. Its totient is φ = 105266880.

The previous prime is 215797249. The next prime is 215797277. The reversal of 215797268 is 862797512.

It is a happy number.

215797268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 90402064 + 125395204 = 9508^2 + 11198^2 .

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, 657755 + ... + 658082.

It is an arithmetic number, because the mean of its divisors is an integer number (32238031).

Almost surely, 2^215797268 is an apocalyptic number.

It is an amenable number.

215797268 is a deficient number, since it is larger than the sum of its proper divisors (171059104).

215797268 is a wasteful number, since it uses less digits than its factorization.

215797268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315882 (or 1315880 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The square root of 215797268 is about 14690.0397548815. The cubic root of 215797268 is about 599.8122264265.

The spelling of 215797268 in words is "two hundred fifteen million, seven hundred ninety-seven thousand, two hundred sixty-eight".