225997242 has 8 divisors (see below), whose sum is σ = 451994496. Its totient is φ = 75332412.

The previous prime is 225997237. The next prime is 225997249. The reversal of 225997242 is 242799522.

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

225997242 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 225997194 and 225997203.

It is not an unprimeable number, because it can be changed into a prime (225997249) 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, 18833098 + ... + 18833109.

It is an arithmetic number, because the mean of its divisors is an integer number (56499312).

Almost surely, 2^225997242 is an apocalyptic number.

225997242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

225997242 is a wasteful number, since it uses less digits than its factorization.

225997242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37666212.

The product of its digits is 181440, while the sum is 42.

The square root of 225997242 is about 15033.2046483775. The cubic root of 225997242 is about 609.1174570754.

The spelling of 225997242 in words is "two hundred twenty-five million, nine hundred ninety-seven thousand, two hundred forty-two".