220523350520 has 128 divisors (see below), whose sum is σ = 544092120000. Its totient is φ = 79775539200.

The previous prime is 220523350517. The next prime is 220523350529. The reversal of 220523350520 is 25053325022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220523350529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80218106 + ... + 80220854.

Almost surely, 2^220523350520 is an apocalyptic number.

220523350520 is a gapful number since it is divisible by the number (20) 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 220523350520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272046060000).

220523350520 is an abundant number, since it is smaller than the sum of its proper divisors (323568769480).

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

220523350520 is a wasteful number, since it uses less digits than its factorization.

220523350520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649 (or 3645 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 29.

Adding to 220523350520 its reverse (25053325022), we get a palindrome (245576675542).

The spelling of 220523350520 in words is "two hundred twenty billion, five hundred twenty-three million, three hundred fifty thousand, five hundred twenty".