221801059 has 2 divisors, whose sum is σ = 221801060. Its totient is φ = 221801058.

The previous prime is 221800993. The next prime is 221801071. The reversal of 221801059 is 950108122.

221801059 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221801059 is a prime.

It is not a weakly prime, because it can be changed into another prime (221804059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110900529 + 110900530.

It is an arithmetic number, because the mean of its divisors is an integer number (110900530).

Almost surely, 2^221801059 is an apocalyptic number.

221801059 is a deficient number, since it is larger than the sum of its proper divisors (1).

221801059 is an equidigital number, since it uses as much as digits as its factorization.

221801059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 221801059 is about 14892.9869065947. The cubic root of 221801059 is about 605.3239701020.

It can be divided in two parts, 22 and 1801059, that added together give a palindrome (1801081).

The spelling of 221801059 in words is "two hundred twenty-one million, eight hundred one thousand, fifty-nine".