215968487 has 8 divisors (see below), whose sum is σ = 250867872. Its totient is φ = 182080800.

The previous prime is 215968477. The next prime is 215968507. The reversal of 215968487 is 784869512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215968487 - 2⁴ = 215968471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215968457) 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 7 ways as a sum of consecutive naturals, for example, 252464 + ... + 253317.

It is an arithmetic number, because the mean of its divisors is an integer number (31358484).

Almost surely, 2^215968487 is an apocalyptic number.

215968487 is a deficient number, since it is larger than the sum of its proper divisors (34899385).

215968487 is an equidigital number, since it uses as much as digits as its factorization.

215968487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505849.

The product of its digits is 967680, while the sum is 50.

The square root of 215968487 is about 14695.8663235619. The cubic root of 215968487 is about 599.9708198772.

The spelling of 215968487 in words is "two hundred fifteen million, nine hundred sixty-eight thousand, four hundred eighty-seven".