223145225 has 6 divisors (see below), whose sum is σ = 276700110. Its totient is φ = 178516160.

The previous prime is 223145201. The next prime is 223145297. The reversal of 223145225 is 522541322.

223145225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 59228416 + 163916809 = 7696^2 + 12803^2 .

It is not a de Polignac number, because 223145225 - 2²⁰ = 222096649 is a prime.

It is a super-3 number, since 3×223145225³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223145194 and 223145203.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4462880 + ... + 4462929.

It is an arithmetic number, because the mean of its divisors is an integer number (46116685).

Almost surely, 2^223145225 is an apocalyptic number.

223145225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

223145225 is a deficient number, since it is larger than the sum of its proper divisors (53554885).

223145225 is an equidigital number, since it uses as much as digits as its factorization.

223145225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8925819 (or 8925814 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 223145225 is about 14938.0462243226. The cubic root of 223145225 is about 606.5443095762.

Adding to 223145225 its reverse (522541322), we get a palindrome (745686547).

The spelling of 223145225 in words is "two hundred twenty-three million, one hundred forty-five thousand, two hundred twenty-five".