225122405 has 8 divisors (see below), whose sum is σ = 270572184. Its totient is φ = 179814400.

The previous prime is 225122399. The next prime is 225122407. The reversal of 225122405 is 504221522.

225122405 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 4 ways, for example, as 145395364 + 79727041 = 12058^2 + 8929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225122405 - 2¹⁸ = 224860261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225122407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31916 + ... + 38325.

It is an arithmetic number, because the mean of its divisors is an integer number (33821523).

Almost surely, 2^225122405 is an apocalyptic number.

It is an amenable number.

225122405 is a deficient number, since it is larger than the sum of its proper divisors (45449779).

225122405 is an equidigital number, since it uses as much as digits as its factorization.

225122405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70887.

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

The square root of 225122405 is about 15004.0796118922. The cubic root of 225122405 is about 608.3304746639.

Adding to 225122405 its reverse (504221522), we get a palindrome (729343927).

The spelling of 225122405 in words is "two hundred twenty-five million, one hundred twenty-two thousand, four hundred five".