225021236 has 48 divisors (see below), whose sum is σ = 458777088. Its totient is φ = 95541600.

The previous prime is 225021229. The next prime is 225021239. The reversal of 225021236 is 632120522.

225021236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225021239) 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, 40931 + ... + 46101.

It is an arithmetic number, because the mean of its divisors is an integer number (9557856).

Almost surely, 2^225021236 is an apocalyptic number.

It is an amenable number.

225021236 is an abundant number, since it is smaller than the sum of its proper divisors (233755852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225021236 is a wasteful number, since it uses less digits than its factorization.

225021236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252 (or 5250 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 225021236 is about 15000.7078499649. The cubic root of 225021236 is about 608.2393340134.

Adding to 225021236 its reverse (632120522), we get a palindrome (857141758).

The spelling of 225021236 in words is "two hundred twenty-five million, twenty-one thousand, two hundred thirty-six".