221065126 has 8 divisors (see below), whose sum is σ = 333281520. Its totient is φ = 109971288.

The previous prime is 221065079. The next prime is 221065129. The reversal of 221065126 is 621560122.

221065126 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221065126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221065129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280146 + ... + 280933.

It is an arithmetic number, because the mean of its divisors is an integer number (41660190).

Almost surely, 2^221065126 is an apocalyptic number.

221065126 is a deficient number, since it is larger than the sum of its proper divisors (112216394).

221065126 is a wasteful number, since it uses less digits than its factorization.

221065126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561278.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 221065126 is about 14868.2590103885. The cubic root of 221065126 is about 604.6537426256.

The spelling of 221065126 in words is "two hundred twenty-one million, sixty-five thousand, one hundred twenty-six".