63221667 has 4 divisors (see below), whose sum is σ = 84295560. Its totient is φ = 42147776.

The previous prime is 63221659. The next prime is 63221677. The reversal of 63221667 is 76612236.

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

It is a cyclic number.

It is not a de Polignac number, because 63221667 - 2³ = 63221659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63221647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10536942 + ... + 10536947.

It is an arithmetic number, because the mean of its divisors is an integer number (21073890).

Almost surely, 2^63221667 is an apocalyptic number.

63221667 is a deficient number, since it is larger than the sum of its proper divisors (21073893).

63221667 is a wasteful number, since it uses less digits than its factorization.

63221667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21073892.

The product of its digits is 18144, while the sum is 33.

The square root of 63221667 is about 7951.2053803181. The cubic root of 63221667 is about 398.3718547660.

The spelling of 63221667 in words is "sixty-three million, two hundred twenty-one thousand, six hundred sixty-seven".