225140421 has 16 divisors (see below), whose sum is σ = 327781440. Its totient is φ = 136321920.

The previous prime is 225140411. The next prime is 225140429. The reversal of 225140421 is 124041522.

It is not a de Polignac number, because 225140421 - 2¹⁷ = 225009349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225140429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42825 + ... + 47793.

It is an arithmetic number, because the mean of its divisors is an integer number (20486340).

Almost surely, 2^225140421 is an apocalyptic number.

It is an amenable number.

225140421 is a deficient number, since it is larger than the sum of its proper divisors (102641019).

225140421 is a wasteful number, since it uses less digits than its factorization.

225140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 225140421 is about 15004.6799699294. The cubic root of 225140421 is about 608.3467019685.

Adding to 225140421 its reverse (124041522), we get a palindrome (349181943).

The spelling of 225140421 in words is "two hundred twenty-five million, one hundred forty thousand, four hundred twenty-one".