221701983 has 4 divisors (see below), whose sum is σ = 295602648. Its totient is φ = 147801320.

The previous prime is 221701979. The next prime is 221701993. The reversal of 221701983 is 389107122.

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

It is a cyclic number.

It is not a de Polignac number, because 221701983 - 2² = 221701979 is a prime.

It is a super-2 number, since 2×221701983² = 98303538532264578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221701943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36950328 + ... + 36950333.

It is an arithmetic number, because the mean of its divisors is an integer number (73900662).

Almost surely, 2^221701983 is an apocalyptic number.

221701983 is a deficient number, since it is larger than the sum of its proper divisors (73900665).

221701983 is an equidigital number, since it uses as much as digits as its factorization.

221701983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73900664.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 221701983 is about 14889.6602714770. The cubic root of 221701983 is about 605.2338262438.

The spelling of 221701983 in words is "two hundred twenty-one million, seven hundred one thousand, nine hundred eighty-three".