225391388 has 12 divisors (see below), whose sum is σ = 395830680. Its totient is φ = 112296912.

The previous prime is 225391381. The next prime is 225391403. The reversal of 225391388 is 883193522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225391381) 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, 98423 + ... + 100686.

It is an arithmetic number, because the mean of its divisors is an integer number (32985890).

Almost surely, 2^225391388 is an apocalyptic number.

It is an amenable number.

225391388 is a deficient number, since it is larger than the sum of its proper divisors (170439292).

225391388 is a wasteful number, since it uses less digits than its factorization.

225391388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199396 (or 199394 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 225391388 is about 15013.0405980934. The cubic root of 225391388 is about 608.5726620627.

The spelling of 225391388 in words is "two hundred twenty-five million, three hundred ninety-one thousand, three hundred eighty-eight".