225244042 has 4 divisors (see below), whose sum is σ = 337866066. Its totient is φ = 112622020.

The previous prime is 225244027. The next prime is 225244051. The reversal of 225244042 is 240442522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240442522 = 2 ⋅120221261.

It can be written as a sum of positive squares in only one way, i.e., 157527601 + 67716441 = 12551^2 + 8229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 225243998 and 225244016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56311009 + ... + 56311012.

Almost surely, 2^225244042 is an apocalyptic number.

225244042 is a deficient number, since it is larger than the sum of its proper divisors (112622024).

225244042 is a wasteful number, since it uses less digits than its factorization.

225244042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112622023.

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

The square root of 225244042 is about 15008.1325287325. The cubic root of 225244042 is about 608.4400182860.

Adding to 225244042 its reverse (240442522), we get a palindrome (465686564).

The spelling of 225244042 in words is "two hundred twenty-five million, two hundred forty-four thousand, forty-two".