225642236 has 12 divisors (see below), whose sum is σ = 412042512. Its totient is φ = 107915808.

The previous prime is 225642227. The next prime is 225642239. The reversal of 225642236 is 632246522.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225642239) 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, 1226225 + ... + 1226408.

It is an arithmetic number, because the mean of its divisors is an integer number (34336876).

Almost surely, 2^225642236 is an apocalyptic number.

It is an amenable number.

225642236 is a deficient number, since it is larger than the sum of its proper divisors (186400276).

225642236 is a wasteful number, since it uses less digits than its factorization.

225642236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452660 (or 2452658 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 225642236 is about 15021.3926118719. The cubic root of 225642236 is about 608.7983474623.

Adding to 225642236 its reverse (632246522), we get a palindrome (857888758).

The spelling of 225642236 in words is "two hundred twenty-five million, six hundred forty-two thousand, two hundred thirty-six".