220522520 has 16 divisors (see below), whose sum is σ = 496175760. Its totient is φ = 88208992.

The previous prime is 220522507. The next prime is 220522529. The reversal of 220522520 is 25225022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 220522492 and 220522501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220522529) 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 3 ways as a sum of consecutive naturals, for example, 2756492 + ... + 2756571.

It is an arithmetic number, because the mean of its divisors is an integer number (31010985).

Almost surely, 2^220522520 is an apocalyptic number.

220522520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220522520 is an abundant number, since it is smaller than the sum of its proper divisors (275653240).

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

220522520 is a wasteful number, since it uses less digits than its factorization.

220522520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513074 (or 5513070 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 220522520 is about 14850.0006734007. Note that the first 3 decimals coincide. The cubic root of 220522520 is about 604.1586282772.

Subtracting from 220522520 its sum of digits (20), we obtain a square (220522500 = 14850²).

Adding to 220522520 its reverse (25225022), we get a palindrome (245747542).

The spelling of 220522520 in words is "two hundred twenty million, five hundred twenty-two thousand, five hundred twenty".