4221733521 has 4 divisors (see below), whose sum is σ = 5628978032. Its totient is φ = 2814489012.

The previous prime is 4221733517. The next prime is 4221733541. The reversal of 4221733521 is 1253371224.

4221733521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 4221733521 - 2² = 4221733517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221733511) 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, 703622251 + ... + 703622256.

It is an arithmetic number, because the mean of its divisors is an integer number (1407244508).

Almost surely, 2^4221733521 is an apocalyptic number.

It is an amenable number.

4221733521 is a deficient number, since it is larger than the sum of its proper divisors (1407244511).

4221733521 is a wasteful number, since it uses less digits than its factorization.

4221733521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407244510.

The product of its digits is 10080, while the sum is 30.

The square root of 4221733521 is about 64974.8683800129. The cubic root of 4221733521 is about 1616.2068345004.

The spelling of 4221733521 in words is "four billion, two hundred twenty-one million, seven hundred thirty-three thousand, five hundred twenty-one".