215447283 has 20 divisors (see below), whose sum is σ = 322435960. Its totient is φ = 143366112.

The previous prime is 215447257. The next prime is 215447317. The reversal of 215447283 is 382744512.

It is a happy number.

It is not a de Polignac number, because 215447283 - 2²⁰ = 214398707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215447203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47991 + ... + 52287.

It is an arithmetic number, because the mean of its divisors is an integer number (16121798).

Almost surely, 2^215447283 is an apocalyptic number.

215447283 is a deficient number, since it is larger than the sum of its proper divisors (106988677).

215447283 is an equidigital number, since it uses as much as digits as its factorization.

215447283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928 (or 4919 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 215447283 is about 14678.1225979347. The cubic root of 215447283 is about 599.4877878556.

The spelling of 215447283 in words is "two hundred fifteen million, four hundred forty-seven thousand, two hundred eighty-three".