225420442 has 32 divisors (see below), whose sum is σ = 387459072. Its totient is φ = 97438464.

The previous prime is 225420421. The next prime is 225420469. The reversal of 225420442 is 244024522.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97423 + ... + 99709.

It is an arithmetic number, because the mean of its divisors is an integer number (12108096).

Almost surely, 2^225420442 is an apocalyptic number.

225420442 is a deficient number, since it is larger than the sum of its proper divisors (162038630).

225420442 is a wasteful number, since it uses less digits than its factorization.

225420442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 225420442 is about 15014.0081923516. The cubic root of 225420442 is about 608.5988102231.

Adding to 225420442 its reverse (244024522), we get a palindrome (469444964).

The spelling of 225420442 in words is "two hundred twenty-five million, four hundred twenty thousand, four hundred forty-two".