4382219921 has 2 divisors, whose sum is σ = 4382219922. Its totient is φ = 4382219920.

The previous prime is 4382219903. The next prime is 4382219927. The reversal of 4382219921 is 1299122834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3565403521 + 816816400 = 59711^2 + 28580^2 .

It is a cyclic number.

It is not a de Polignac number, because 4382219921 - 2¹⁴ = 4382203537 is a prime.

It is not a weakly prime, because it can be changed into another prime (4382219927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2191109960 + 2191109961.

It is an arithmetic number, because the mean of its divisors is an integer number (2191109961).

Almost surely, 2^4382219921 is an apocalyptic number.

It is an amenable number.

4382219921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4382219921 is an equidigital number, since it uses as much as digits as its factorization.

4382219921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 4382219921 is about 66198.3377510342. The cubic root of 4382219921 is about 1636.4323497942.

The spelling of 4382219921 in words is "four billion, three hundred eighty-two million, two hundred nineteen thousand, nine hundred twenty-one".