225520042 has 12 divisors (see below), whose sum is σ = 371828898. Its totient is φ = 102509000.

The previous prime is 225520039. The next prime is 225520073. The reversal of 225520042 is 240025522.

It is a happy number.

225520042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 118831801 + 106688241 = 10901^2 + 10329^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 225519995 and 225520022.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 465709 + ... + 466192.

Almost surely, 2^225520042 is an apocalyptic number.

225520042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

225520042 is a deficient number, since it is larger than the sum of its proper divisors (146308856).

225520042 is a wasteful number, since it uses less digits than its factorization.

225520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931925 (or 931914 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 225520042 is about 15017.3247284595. The cubic root of 225520042 is about 608.6884316663.

Adding to 225520042 its reverse (240025522), we get a palindrome (465545564).

The spelling of 225520042 in words is "two hundred twenty-five million, five hundred twenty thousand, forty-two".