221675863 has 6 divisors (see below), whose sum is σ = 231733544. Its totient is φ = 212037276.

The previous prime is 221675849. The next prime is 221675887. The reversal of 221675863 is 368576122.

221675863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221675863 - 2⁹ = 221675351 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 (221675813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208995 + ... + 210052.

Almost surely, 2^221675863 is an apocalyptic number.

221675863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221675863 is a deficient number, since it is larger than the sum of its proper divisors (10057681).

221675863 is an equidigital number, since it uses as much as digits as its factorization.

221675863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419093 (or 419070 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 221675863 is about 14888.7831269046. The cubic root of 221675863 is about 605.2100566046.

The spelling of 221675863 in words is "two hundred twenty-one million, six hundred seventy-five thousand, eight hundred sixty-three".