4225521523 has 4 divisors (see below), whose sum is σ = 4226016520. Its totient is φ = 4225026528.

The previous prime is 4225521499. The next prime is 4225521569. The reversal of 4225521523 is 3251255224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4225521523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4225521583) 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, 234465 + ... + 251842.

It is an arithmetic number, because the mean of its divisors is an integer number (1056504130).

Almost surely, 2^4225521523 is an apocalyptic number.

4225521523 is a deficient number, since it is larger than the sum of its proper divisors (494997).

4225521523 is an equidigital number, since it uses as much as digits as its factorization.

4225521523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494996.

The product of its digits is 24000, while the sum is 31.

The square root of 4225521523 is about 65004.0115915933. The cubic root of 4225521523 is about 1616.6900771093.

Adding to 4225521523 its reverse (3251255224), we get a palindrome (7476776747).

The spelling of 4225521523 in words is "four billion, two hundred twenty-five million, five hundred twenty-one thousand, five hundred twenty-three".