4219475821 has 6 divisors (see below), whose sum is σ = 4637936366. Its totient is φ = 3835887000.

The previous prime is 4219475797. The next prime is 4219475839. The reversal of 4219475821 is 1285749124.

It can be written as a sum of positive squares in only one way, i.e., 2531498596 + 1687977225 = 50314^2 + 41085^2 .

It is not a de Polignac number, because 4219475821 - 2¹⁹ = 4218951533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4219475891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17435730 + ... + 17435971.

Almost surely, 2^4219475821 is an apocalyptic number.

It is an amenable number.

4219475821 is a deficient number, since it is larger than the sum of its proper divisors (418460545).

4219475821 is a wasteful number, since it uses less digits than its factorization.

4219475821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34871723 (or 34871712 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 4219475821 is about 64957.4924161948. The cubic root of 4219475821 is about 1615.9186779252.

The spelling of 4219475821 in words is "four billion, two hundred nineteen million, four hundred seventy-five thousand, eight hundred twenty-one".