4221522601 has 4 divisors (see below), whose sum is σ = 4222012032. Its totient is φ = 4221033172.

The previous prime is 4221522589. The next prime is 4221522607. The reversal of 4221522601 is 1062251224.

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 a de Polignac number, because none of the positive numbers 2^k-4221522601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221522607) 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, 231541 + ... + 249106.

It is an arithmetic number, because the mean of its divisors is an integer number (1055503008).

Almost surely, 2^4221522601 is an apocalyptic number.

It is an amenable number.

4221522601 is a deficient number, since it is larger than the sum of its proper divisors (489431).

4221522601 is an equidigital number, since it uses as much as digits as its factorization.

4221522601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489430.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4221522601 is about 64973.2452706497. The cubic root of 4221522601 is about 1616.1799185411.

Adding to 4221522601 its reverse (1062251224), we get a palindrome (5283773825).

The spelling of 4221522601 in words is "four billion, two hundred twenty-one million, five hundred twenty-two thousand, six hundred one".