221522159 has 4 divisors (see below), whose sum is σ = 233181240. Its totient is φ = 209863080.

The previous prime is 221522153. The next prime is 221522183. The reversal of 221522159 is 951225122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221522159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221522153) 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, 5829512 + ... + 5829549.

It is an arithmetic number, because the mean of its divisors is an integer number (58295310).

Almost surely, 2^221522159 is an apocalyptic number.

221522159 is a deficient number, since it is larger than the sum of its proper divisors (11659081).

221522159 is a wasteful number, since it uses less digits than its factorization.

221522159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11659080.

The product of its digits is 3600, while the sum is 29.

The square root of 221522159 is about 14883.6204936837. The cubic root of 221522159 is about 605.0701455448.

The spelling of 221522159 in words is "two hundred twenty-one million, five hundred twenty-two thousand, one hundred fifty-nine".