68221335 has 128 divisors (see below), whose sum is σ = 146313216. Its totient is φ = 26357760.

The previous prime is 68221301. The next prime is 68221397. The reversal of 68221335 is 53312286.

It is not a de Polignac number, because 68221335 - 2¹³ = 68213143 is a prime.

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 1287169 + ... + 1287221.

It is an arithmetic number, because the mean of its divisors is an integer number (1143072).

Almost surely, 2^68221335 is an apocalyptic number.

68221335 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68221335 is an abundant number, since it is smaller than the sum of its proper divisors (78091881).

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

68221335 is a wasteful number, since it uses less digits than its factorization.

68221335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its digits is 8640, while the sum is 30.

The square root of 68221335 is about 8259.6207540056. The cubic root of 68221335 is about 408.6078801523.

The spelling of 68221335 in words is "sixty-eight million, two hundred twenty-one thousand, three hundred thirty-five".