223513225 has 24 divisors (see below), whose sum is σ = 302596952. Its totient is φ = 162777600.

The previous prime is 223513223. The next prime is 223513253. The reversal of 223513225 is 522315322.

223513225 = 10571² + 10572².

It can be written as a sum of positive squares in 12 ways, for example, as 111746041 + 111767184 = 10571^2 + 10572^2 .

It is not a de Polignac number, because 223513225 - 2¹ = 223513223 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223513225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223513223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19015 + ... + 28435.

Almost surely, 2^223513225 is an apocalyptic number.

223513225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

223513225 is the 10572-nd centered square number.

It is an amenable number.

223513225 is a deficient number, since it is larger than the sum of its proper divisors (79083727).

223513225 is a wasteful number, since it uses less digits than its factorization.

223513225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9517 (or 9512 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 223513225 is about 14950.3586913492. The cubic root of 223513225 is about 606.8775540166.

Adding to 223513225 its reverse (522315322), we get a palindrome (745828547).

The spelling of 223513225 in words is "two hundred twenty-three million, five hundred thirteen thousand, two hundred twenty-five".