67221172 has 24 divisors (see below), whose sum is σ = 120997800. Its totient is φ = 32662656.

The previous prime is 67221163. The next prime is 67221191. The reversal of 67221172 is 27112276.

It can be written as a sum of positive squares in 4 ways, for example, as 35569296 + 31651876 = 5964^2 + 5626^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67221172.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21654 + ... + 24562.

It is an arithmetic number, because the mean of its divisors is an integer number (5041575).

Almost surely, 2^67221172 is an apocalyptic number.

It is an amenable number.

67221172 is a deficient number, since it is larger than the sum of its proper divisors (53776628).

67221172 is a wasteful number, since it uses less digits than its factorization.

67221172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075 (or 3073 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 67221172 is about 8198.8518708414. The cubic root of 67221172 is about 406.6012349563.

The spelling of 67221172 in words is "sixty-seven million, two hundred twenty-one thousand, one hundred seventy-two".