4220523520 has 88 divisors (see below), whose sum is σ = 10451294208. Its totient is φ = 1633689600.

The previous prime is 4220523499. The next prime is 4220523521. The reversal of 4220523520 is 253250224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220523521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145425 + ... + 172015.

Almost surely, 2^4220523520 is an apocalyptic number.

4220523520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4220523520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5225647104).

4220523520 is an abundant number, since it is smaller than the sum of its proper divisors (6230770688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4220523520 is a wasteful number, since it uses less digits than its factorization.

4220523520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26647 (or 26629 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 4220523520 is about 64965.5564126099. The cubic root of 4220523520 is about 1616.0524114622.

Adding to 4220523520 its reverse (253250224), we get a palindrome (4473773744).

The spelling of 4220523520 in words is "four billion, two hundred twenty million, five hundred twenty-three thousand, five hundred twenty".