68240215 has 4 divisors (see below), whose sum is σ = 81888264. Its totient is φ = 54592168.

The previous prime is 68240177. The next prime is 68240233. The reversal of 68240215 is 51204286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68240215 - 2¹¹ = 68238167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6824017 + ... + 6824026.

It is an arithmetic number, because the mean of its divisors is an integer number (20472066).

Almost surely, 2^68240215 is an apocalyptic number.

68240215 is a deficient number, since it is larger than the sum of its proper divisors (13648049).

68240215 is a wasteful number, since it uses less digits than its factorization.

68240215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13648048.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 68240215 is about 8260.7635845604. The cubic root of 68240215 is about 408.6455702445.

The spelling of 68240215 in words is "sixty-eight million, two hundred forty thousand, two hundred fifteen".