221310042 has 16 divisors (see below), whose sum is σ = 442828512. Its totient is φ = 73735280.

The previous prime is 221310031. The next prime is 221310079. The reversal of 221310042 is 240013122.

221310042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7417 + ... + 22307.

It is an arithmetic number, because the mean of its divisors is an integer number (27676782).

Almost surely, 2^221310042 is an apocalyptic number.

221310042 is an abundant number, since it is smaller than the sum of its proper divisors (221518470).

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

221310042 is a wasteful number, since it uses less digits than its factorization.

221310042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17373.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221310042 is about 14876.4929334840. The cubic root of 221310042 is about 604.8769569688.

Adding to 221310042 its reverse (240013122), we get a palindrome (461323164).

The spelling of 221310042 in words is "two hundred twenty-one million, three hundred ten thousand, forty-two".