67221297 has 48 divisors (see below), whose sum is σ = 120120000. Its totient is φ = 35614080.

The previous prime is 67221293. The next prime is 67221307. The reversal of 67221297 is 79212276.

It is not a de Polignac number, because 67221297 - 2² = 67221293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67221293) 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 47 ways as a sum of consecutive naturals, for example, 23079 + ... + 25827.

It is an arithmetic number, because the mean of its divisors is an integer number (2502500).

Almost surely, 2^67221297 is an apocalyptic number.

It is an amenable number.

67221297 is a deficient number, since it is larger than the sum of its proper divisors (52898703).

67221297 is a wasteful number, since it uses less digits than its factorization.

67221297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798 (or 2795 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 67221297 is about 8198.8594938564. The cubic root of 67221297 is about 406.6014869857.

The spelling of 67221297 in words is "sixty-seven million, two hundred twenty-one thousand, two hundred ninety-seven".