68221995 has 32 divisors (see below), whose sum is σ = 111939840. Its totient is φ = 35468160.

The previous prime is 68221981. The next prime is 68222029. The reversal of 68221995 is 59912286.

It is a de Polignac number, because none of the positive numbers 2^k-68221995 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138700 + ... + 139190.

It is an arithmetic number, because the mean of its divisors is an integer number (3498120).

Almost surely, 2^68221995 is an apocalyptic number.

68221995 is a deficient number, since it is larger than the sum of its proper divisors (43717845).

68221995 is a wasteful number, since it uses less digits than its factorization.

68221995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its digits is 77760, while the sum is 42.

The square root of 68221995 is about 8259.6607073172. The cubic root of 68221995 is about 408.6091978257.

The spelling of 68221995 in words is "sixty-eight million, two hundred twenty-one thousand, nine hundred ninety-five".