68221775 has 12 divisors (see below), whose sum is σ = 87513000. Its totient is φ = 52694880.

The previous prime is 68221771. The next prime is 68221801. The reversal of 68221775 is 57712286.

It is not a de Polignac number, because 68221775 - 2² = 68221771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68221771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46325 + ... + 47774.

It is an arithmetic number, because the mean of its divisors is an integer number (7292750).

Almost surely, 2^68221775 is an apocalyptic number.

68221775 is a deficient number, since it is larger than the sum of its proper divisors (19291225).

68221775 is a wasteful number, since it uses less digits than its factorization.

68221775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94138 (or 94133 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 68221775 is about 8259.6473895682. The cubic root of 68221775 is about 408.6087586022.

The spelling of 68221775 in words is "sixty-eight million, two hundred twenty-one thousand, seven hundred seventy-five".