215340668 has 6 divisors (see below), whose sum is σ = 376846176. Its totient is φ = 107670332.

The previous prime is 215340667. The next prime is 215340691. The reversal of 215340668 is 866043512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215340667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26917580 + ... + 26917587.

It is an arithmetic number, because the mean of its divisors is an integer number (62807696).

Almost surely, 2^215340668 is an apocalyptic number.

It is an amenable number.

215340668 is a deficient number, since it is larger than the sum of its proper divisors (161505508).

215340668 is a wasteful number, since it uses less digits than its factorization.

215340668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53835171 (or 53835169 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 215340668 is about 14674.4903829741. The cubic root of 215340668 is about 599.3888851832.

The spelling of 215340668 in words is "two hundred fifteen million, three hundred forty thousand, six hundred sixty-eight".