220402225 has 12 divisors (see below), whose sum is σ = 274092700. Its totient is φ = 175809600.

The previous prime is 220402213. The next prime is 220402253. The reversal of 220402225 is 522204022.

It can be written as a sum of positive squares in 6 ways, for example, as 11397376 + 209004849 = 3376^2 + 14457^2 .

It is not a de Polignac number, because 220402225 - 2⁷ = 220402097 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3906 + ... + 21355.

Almost surely, 2^220402225 is an apocalyptic number.

220402225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220402225 is a deficient number, since it is larger than the sum of its proper divisors (53690475).

220402225 is a wasteful number, since it uses less digits than its factorization.

220402225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25620 (or 25615 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 220402225 is about 14845.9497843688. The cubic root of 220402225 is about 604.0487521501.

Adding to 220402225 its reverse (522204022), we get a palindrome (742606247).

The spelling of 220402225 in words is "two hundred twenty million, four hundred two thousand, two hundred twenty-five".