478322221 has 12 divisors (see below), whose sum is σ = 518607360. Its totient is φ = 440965200.

The previous prime is 478322209. The next prime is 478322231. The reversal of 478322221 is 122223874.

It is not a de Polignac number, because 478322221 - 2¹⁷ = 478191149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478322231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193290 + ... + 195748.

It is an arithmetic number, because the mean of its divisors is an integer number (43217280).

Almost surely, 2^478322221 is an apocalyptic number.

It is an amenable number.

478322221 is a deficient number, since it is larger than the sum of its proper divisors (40285139).

478322221 is a wasteful number, since it uses less digits than its factorization.

478322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636 (or 3623 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 478322221 is about 21870.5788903723. The cubic root of 478322221 is about 782.0602017786.

The spelling of 478322221 in words is "four hundred seventy-eight million, three hundred twenty-two thousand, two hundred twenty-one".