221446263 has 16 divisors (see below), whose sum is σ = 297513216. Its totient is φ = 146510400.

The previous prime is 221446249. The next prime is 221446297. The reversal of 221446263 is 362644122.

It is a de Polignac number, because none of the positive numbers 2^k-221446263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221446263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221444263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368163 + ... + 368763.

It is an arithmetic number, because the mean of its divisors is an integer number (18594576).

Almost surely, 2^221446263 is an apocalyptic number.

221446263 is a deficient number, since it is larger than the sum of its proper divisors (76066953).

221446263 is a wasteful number, since it uses less digits than its factorization.

221446263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334.

The product of its digits is 13824, while the sum is 30.

The square root of 221446263 is about 14881.0706268064. The cubic root of 221446263 is about 605.0010363573.

The spelling of 221446263 in words is "two hundred twenty-one million, four hundred forty-six thousand, two hundred sixty-three".