4223377821 has 16 divisors (see below), whose sum is σ = 6072719744. Its totient is φ = 2595409344.

The previous prime is 4223377811. The next prime is 4223377859. The reversal of 4223377821 is 1287733224.

It is not a de Polignac number, because 4223377821 - 2⁵ = 4223377789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 4223377821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223377811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46126 + ... + 102831.

It is an arithmetic number, because the mean of its divisors is an integer number (379544984).

Almost surely, 2^4223377821 is an apocalyptic number.

It is an amenable number.

4223377821 is a deficient number, since it is larger than the sum of its proper divisors (1849341923).

4223377821 is a wasteful number, since it uses less digits than its factorization.

4223377821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149700.

The product of its digits is 112896, while the sum is 39.

The square root of 4223377821 is about 64987.5205020164. The cubic root of 4223377821 is about 1616.4166364642.

The spelling of 4223377821 in words is "four billion, two hundred twenty-three million, three hundred seventy-seven thousand, eight hundred twenty-one".