225202405 has 4 divisors (see below), whose sum is σ = 270242892. Its totient is φ = 180161920.

The previous prime is 225202403. The next prime is 225202441. The reversal of 225202405 is 504202522.

It is a happy number.

225202405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44595684 + 180606721 = 6678^2 + 13439^2 .

It is not a de Polignac number, because 225202405 - 2¹ = 225202403 is a prime.

It is a super-2 number, since 2×225202405² = 101432246435568050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225202403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22520236 + ... + 22520245.

It is an arithmetic number, because the mean of its divisors is an integer number (67560723).

Almost surely, 2^225202405 is an apocalyptic number.

It is an amenable number.

225202405 is a deficient number, since it is larger than the sum of its proper divisors (45040487).

225202405 is an equidigital number, since it uses as much as digits as its factorization.

225202405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45040486.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 225202405 is about 15006.7453166901. The cubic root of 225202405 is about 608.4025253547.

Adding to 225202405 its reverse (504202522), we get a palindrome (729404927).

The spelling of 225202405 in words is "two hundred twenty-five million, two hundred two thousand, four hundred five".