68783215 has 16 divisors (see below), whose sum is σ = 85730400. Its totient is φ = 52915072.

The previous prime is 68783161. The next prime is 68783219. The reversal of 68783215 is 51238786.

It is a cyclic number.

It is not a de Polignac number, because 68783215 - 2¹⁵ = 68750447 is a prime.

It is a super-3 number, since 3×68783215³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68783219) 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 15 ways as a sum of consecutive naturals, for example, 41676 + ... + 43294.

It is an arithmetic number, because the mean of its divisors is an integer number (5358150).

Almost surely, 2^68783215 is an apocalyptic number.

68783215 is a deficient number, since it is larger than the sum of its proper divisors (16947185).

68783215 is a wasteful number, since it uses less digits than its factorization.

68783215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

The product of its digits is 80640, while the sum is 40.

The square root of 68783215 is about 8293.5646738902. The cubic root of 68783215 is about 409.7265974206.

The spelling of 68783215 in words is "sixty-eight million, seven hundred eighty-three thousand, two hundred fifteen".