225324991 has 8 divisors (see below), whose sum is σ = 226913264. Its totient is φ = 223741440.

The previous prime is 225324989. The next prime is 225325013. The reversal of 225324991 is 199423522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225324991 - 2¹ = 225324989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225324991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225324901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191836 + ... + 193006.

It is an arithmetic number, because the mean of its divisors is an integer number (28364158).

Almost surely, 2^225324991 is an apocalyptic number.

225324991 is a deficient number, since it is larger than the sum of its proper divisors (1588273).

225324991 is a wasteful number, since it uses less digits than its factorization.

225324991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361.

The product of its digits is 38880, while the sum is 37.

The square root of 225324991 is about 15010.8291243355. The cubic root of 225324991 is about 608.5128973310.

The spelling of 225324991 in words is "two hundred twenty-five million, three hundred twenty-four thousand, nine hundred ninety-one".