225420423 has 16 divisors (see below), whose sum is σ = 307407840. Its totient is φ = 146893824.

The previous prime is 225420421. The next prime is 225420469. The reversal of 225420423 is 324024522.

It is a happy number.

It is not a de Polignac number, because 225420423 - 2¹ = 225420421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225420393 and 225420402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225420421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20193 + ... + 29301.

It is an arithmetic number, because the mean of its divisors is an integer number (19212990).

Almost surely, 2^225420423 is an apocalyptic number.

225420423 is a deficient number, since it is larger than the sum of its proper divisors (81987417).

225420423 is a wasteful number, since it uses less digits than its factorization.

225420423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9298.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 225420423 is about 15014.0075596091. The cubic root of 225420423 is about 608.5987931241.

Adding to 225420423 its reverse (324024522), we get a palindrome (549444945).

The spelling of 225420423 in words is "two hundred twenty-five million, four hundred twenty thousand, four hundred twenty-three".