68221153 has 64 divisors (see below), whose sum is σ = 102574080. Its totient is φ = 43545600.

The previous prime is 68221147. The next prime is 68221159. The reversal of 68221153 is 35112286.

It is an interprime number because it is at equal distance from previous prime (68221147) and next prime (68221159).

It is not a de Polignac number, because 68221153 - 2⁵ = 68221121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68221159) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 323218 + ... + 323428.

It is an arithmetic number, because the mean of its divisors is an integer number (1602720).

Almost surely, 2^68221153 is an apocalyptic number.

It is an amenable number.

68221153 is a deficient number, since it is larger than the sum of its proper divisors (34352927).

68221153 is a wasteful number, since it uses less digits than its factorization.

68221153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its digits is 2880, while the sum is 28.

The square root of 68221153 is about 8259.6097365432. The cubic root of 68221153 is about 408.6075167923.

The spelling of 68221153 in words is "sixty-eight million, two hundred twenty-one thousand, one hundred fifty-three".