220225145 has 48 divisors (see below), whose sum is σ = 320568192. Its totient is φ = 142168320.

The previous prime is 220225133. The next prime is 220225163. The reversal of 220225145 is 541522022.

220225145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220225145 - 2¹² = 220221049 is a prime.

It is a super-2 number, since 2×220225145² = 96998228980542050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220225145.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2653274 + ... + 2653356.

It is an arithmetic number, because the mean of its divisors is an integer number (6678504).

Almost surely, 2^220225145 is an apocalyptic number.

It is an amenable number.

220225145 is a deficient number, since it is larger than the sum of its proper divisors (100343047).

220225145 is an equidigital number, since it uses as much as digits as its factorization.

220225145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 220225145 is about 14839.9846698034. The cubic root of 220225145 is about 603.8869364629.

Adding to 220225145 its reverse (541522022), we get a palindrome (761747167).

The spelling of 220225145 in words is "two hundred twenty million, two hundred twenty-five thousand, one hundred forty-five".