226720042 has 16 divisors (see below), whose sum is σ = 350403912. Its totient is φ = 109969920.

The previous prime is 226720031. The next prime is 226720049. The reversal of 226720042 is 240027622.

226720042 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 4 ways, for example, as 70744921 + 155975121 = 8411^2 + 12489^2 .

It is a junction number, because it is equal to n+sod(n) for n = 226719989 and 226720016.

It is not an unprimeable number, because it can be changed into a prime (226720049) 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, 3823 + ... + 21634.

Almost surely, 2^226720042 is an apocalyptic number.

226720042 is a deficient number, since it is larger than the sum of its proper divisors (123683870).

226720042 is a wasteful number, since it uses less digits than its factorization.

226720042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25593.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 226720042 is about 15057.2255744543. The cubic root of 226720042 is about 609.7661398630.

Adding to 226720042 its reverse (240027622), we get a palindrome (466747664).

The spelling of 226720042 in words is "two hundred twenty-six million, seven hundred twenty thousand, forty-two".