68221154 has 4 divisors (see below), whose sum is σ = 102331734. Its totient is φ = 34110576.

The previous prime is 68221147. The next prime is 68221159. The reversal of 68221154 is 45112286.

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

It can be written as a sum of positive squares in only one way, i.e., 42445225 + 25775929 = 6515^2 + 5077^2 .

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 as a sum of consecutive naturals, namely, 17055287 + ... + 17055290.

Almost surely, 2^68221154 is an apocalyptic number.

68221154 is a deficient number, since it is larger than the sum of its proper divisors (34110580).

68221154 is a wasteful number, since it uses less digits than its factorization.

68221154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34110579.

The product of its digits is 3840, while the sum is 29.

The square root of 68221154 is about 8259.6097970788. The cubic root of 68221154 is about 408.6075187888.

The spelling of 68221154 in words is "sixty-eight million, two hundred twenty-one thousand, one hundred fifty-four".