220522500 has 315 divisors, whose sum is σ = 794732323. Its totient is φ = 53460000.

The previous prime is 220522469. The next prime is 220522501. The reversal of 220522500 is 5225022.

The square root of 220522500 is 14850.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 17288964 + 203233536 = 4158^2 + 14256^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (220522501) by changing a digit.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 20047495 + ... + 20047505.

Almost surely, 2^220522500 is an apocalyptic number.

220522500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

220522500 is the 14850-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220522500

220522500 is an abundant number, since it is smaller than the sum of its proper divisors (574209823).

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

220522500 is an equidigital number, since it uses as much as digits as its factorization.

220522500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The cubic root of 220522500 is about 604.1586100128.

Multiplying 220522500 by its product of nonzero digits (400), we get a square (88209000000 = 297000²).

Adding to 220522500 its reverse (5225022), we get a palindrome (225747522).

It can be divided in two parts, 2 and 20522500, that added together give a palindrome (20522502).

The spelling of 220522500 in words is "two hundred twenty million, five hundred twenty-two thousand, five hundred".