47721219 has 32 divisors (see below), whose sum is σ = 79511040. Its totient is φ = 24786432.

The previous prime is 47721199. The next prime is 47721241. The reversal of 47721219 is 91212774.

It is not a de Polignac number, because 47721219 - 2⁹ = 47720707 is a prime.

It is a super-2 number, since 2×47721219² = 4554629485691922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47721219.

It is not an unprimeable number, because it can be changed into a prime (47721719) 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 31 ways as a sum of consecutive naturals, for example, 16987 + ... + 19595.

It is an arithmetic number, because the mean of its divisors is an integer number (2484720).

Almost surely, 2^47721219 is an apocalyptic number.

47721219 is a deficient number, since it is larger than the sum of its proper divisors (31789821).

47721219 is a wasteful number, since it uses less digits than its factorization.

47721219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699.

The product of its digits is 7056, while the sum is 33.

The square root of 47721219 is about 6908.0546465702. The cubic root of 47721219 is about 362.7191705129.

The spelling of 47721219 in words is "forty-seven million, seven hundred twenty-one thousand, two hundred nineteen".