221763241 has 16 divisors (see below), whose sum is σ = 259660800. Its totient is φ = 185468688.

The previous prime is 221763239. The next prime is 221763247. The reversal of 221763241 is 142367122.

It is a cyclic number.

It is not a de Polignac number, because 221763241 - 2¹ = 221763239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221763247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55476 + ... + 59338.

It is an arithmetic number, because the mean of its divisors is an integer number (16228800).

Almost surely, 2^221763241 is an apocalyptic number.

It is an amenable number.

221763241 is a deficient number, since it is larger than the sum of its proper divisors (37897559).

221763241 is a wasteful number, since it uses less digits than its factorization.

221763241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068.

The product of its digits is 4032, while the sum is 28.

The square root of 221763241 is about 14891.7171944675. The cubic root of 221763241 is about 605.2895647311.

The spelling of 221763241 in words is "two hundred twenty-one million, seven hundred sixty-three thousand, two hundred forty-one".