4221391839 has 32 divisors (see below), whose sum is σ = 6827406336. Its totient is φ = 2264855040.

The previous prime is 4221391831. The next prime is 4221391843. The reversal of 4221391839 is 9381931224.

It is not a de Polignac number, because 4221391839 - 2³ = 4221391831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4221391839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221391831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136254 + ... + 164340.

It is an arithmetic number, because the mean of its divisors is an integer number (213356448).

Almost surely, 2^4221391839 is an apocalyptic number.

4221391839 is a deficient number, since it is larger than the sum of its proper divisors (2606014497).

4221391839 is a wasteful number, since it uses less digits than its factorization.

4221391839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28535.

The product of its digits is 93312, while the sum is 42.

The square root of 4221391839 is about 64972.2389871243. The cubic root of 4221391839 is about 1616.1632312681.

The spelling of 4221391839 in words is "four billion, two hundred twenty-one million, three hundred ninety-one thousand, eight hundred thirty-nine".