47840221 has 8 divisors (see below), whose sum is σ = 56204064. Its totient is φ = 40145520.

The previous prime is 47840203. The next prime is 47840231. The reversal of 47840221 is 12204874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47840221 - 2⁹ = 47839709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47840221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47840231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167131 + ... + 167416.

It is an arithmetic number, because the mean of its divisors is an integer number (7025508).

Almost surely, 2^47840221 is an apocalyptic number.

It is an amenable number.

47840221 is a deficient number, since it is larger than the sum of its proper divisors (8363843).

47840221 is a wasteful number, since it uses less digits than its factorization.

47840221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334571.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 47840221 is about 6916.6625622478. The cubic root of 47840221 is about 363.0204234829.

The spelling of 47840221 in words is "forty-seven million, eight hundred forty thousand, two hundred twenty-one".