220405250 has 64 divisors (see below), whose sum is σ = 450908640. Its totient is φ = 80179200.

The previous prime is 220405223. The next prime is 220405253. The reversal of 220405250 is 52504022.

It can be written as a sum of positive squares in 16 ways, for example, as 90878089 + 129527161 = 9533^2 + 11381^2 .

It is not an unprimeable number, because it can be changed into a prime (220405253) 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 31 ways as a sum of consecutive naturals, for example, 236786 + ... + 237714.

Almost surely, 2^220405250 is an apocalyptic number.

220405250 is an abundant number, since it is smaller than the sum of its proper divisors (230503390).

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

220405250 is a wasteful number, since it uses less digits than its factorization.

220405250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1022 counting only the distinct ones).

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

The square root of 220405250 is about 14846.0516636579. The cubic root of 220405250 is about 604.0515156417.

Adding to 220405250 its reverse (52504022), we get a palindrome (272909272).

The spelling of 220405250 in words is "two hundred twenty million, four hundred five thousand, two hundred fifty".