4222632721 has 4 divisors (see below), whose sum is σ = 4406225472. Its totient is φ = 4039039972.

The previous prime is 4222632709. The next prime is 4222632727. The reversal of 4222632721 is 1272362224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4222632721 - 2⁹ = 4222632209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4222632727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91796341 + ... + 91796386.

It is an arithmetic number, because the mean of its divisors is an integer number (1101556368).

Almost surely, 2^4222632721 is an apocalyptic number.

It is an amenable number.

4222632721 is a deficient number, since it is larger than the sum of its proper divisors (183592751).

4222632721 is a wasteful number, since it uses less digits than its factorization.

4222632721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183592750.

The product of its digits is 16128, while the sum is 31.

The square root of 4222632721 is about 64981.7876100681. The cubic root of 4222632721 is about 1616.3215733085.

Adding to 4222632721 its reverse (1272362224), we get a palindrome (5494994945).

It can be divided in two parts, 42226 and 32721, that added together give a palindrome (74947).

The spelling of 4222632721 in words is "four billion, two hundred twenty-two million, six hundred thirty-two thousand, seven hundred twenty-one".