215223768 has 24 divisors (see below), whose sum is σ = 582897900. Its totient is φ = 71741232.

The previous prime is 215223751. The next prime is 215223769. The reversal of 215223768 is 867322512.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215223769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1494538 + ... + 1494681.

Almost surely, 2^215223768 is an apocalyptic number.

It is an amenable number.

215223768 is an abundant number, since it is smaller than the sum of its proper divisors (367674132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215223768 is a wasteful number, since it uses less digits than its factorization.

215223768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989231 (or 2989224 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 215223768 is about 14670.5067397142. The cubic root of 215223768 is about 599.2804039810.

The spelling of 215223768 in words is "two hundred fifteen million, two hundred twenty-three thousand, seven hundred sixty-eight".