221069534 has 16 divisors (see below), whose sum is σ = 380944608. Its totient is φ = 94252032.

The previous prime is 221069531. The next prime is 221069543. The reversal of 221069534 is 435960122.

It is a happy number.

221069534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221069534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221069531) 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, 38207 + ... + 43610.

It is an arithmetic number, because the mean of its divisors is an integer number (23809038).

Almost surely, 2^221069534 is an apocalyptic number.

221069534 is a deficient number, since it is larger than the sum of its proper divisors (159875074).

221069534 is a wasteful number, since it uses less digits than its factorization.

221069534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82019.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 221069534 is about 14868.4072448934. The cubic root of 221069534 is about 604.6577614956.

The spelling of 221069534 in words is "two hundred twenty-one million, sixty-nine thousand, five hundred thirty-four".