4272231821 has 16 divisors (see below), whose sum is σ = 5060626368. Its totient is φ = 3585075120.

The previous prime is 4272231811. The next prime is 4272231827. The reversal of 4272231821 is 1281322724.

It is not a de Polignac number, because 4272231821 - 2²² = 4268037517 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 (4272231827) 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, 106151 + ... + 140756.

It is an arithmetic number, because the mean of its divisors is an integer number (316289148).

Almost surely, 2^4272231821 is an apocalyptic number.

It is an amenable number.

4272231821 is a deficient number, since it is larger than the sum of its proper divisors (788394547).

4272231821 is a wasteful number, since it uses less digits than its factorization.

4272231821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246953 (or 246931 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 4272231821 is about 65362.3119312651. The cubic root of 4272231821 is about 1622.6254006304.

The spelling of 4272231821 in words is "four billion, two hundred seventy-two million, two hundred thirty-one thousand, eight hundred twenty-one".