220440332500 has 30 divisors (see below), whose sum is σ = 482058924578. Its totient is φ = 88176132000.

The previous prime is 220440332479. The next prime is 220440332501. The reversal of 220440332500 is 5233044022.

It can be written as a sum of positive squares in 5 ways, for example, as 24081453124 + 196358879376 = 155182^2 + 443124^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220440332501) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 44085567 + ... + 44090566.

Almost surely, 2^220440332500 is an apocalyptic number.

220440332500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220440332500 is an abundant number, since it is smaller than the sum of its proper divisors (261618592078).

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

220440332500 is an equidigital number, since it uses as much as digits as its factorization.

220440332500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88176157 (or 88176140 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 220440332500 its reverse (5233044022), we get a palindrome (225673376522).

The spelling of 220440332500 in words is "two hundred twenty billion, four hundred forty million, three hundred thirty-two thousand, five hundred".