221327470 has 96 divisors (see below), whose sum is σ = 503744832. Its totient is φ = 68530176.

The previous prime is 221327441. The next prime is 221327479. The reversal of 221327470 is 74723122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221327479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 626814 + ... + 627166.

It is an arithmetic number, because the mean of its divisors is an integer number (5247342).

Almost surely, 2^221327470 is an apocalyptic number.

221327470 is an abundant number, since it is smaller than the sum of its proper divisors (282417362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221327470 is a wasteful number, since it uses less digits than its factorization.

221327470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 221327470 is about 14877.0786782890. The cubic root of 221327470 is about 604.8928344211.

The spelling of 221327470 in words is "two hundred twenty-one million, three hundred twenty-seven thousand, four hundred seventy".