221301983 has 6 divisors (see below), whose sum is σ = 257432976. Its totient is φ = 189687372.

The previous prime is 221301967. The next prime is 221302007. The reversal of 221301983 is 389103122.

It is not a de Polignac number, because 221301983 - 2⁴ = 221301967 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 (221301943) 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, 2258135 + ... + 2258232.

It is an arithmetic number, because the mean of its divisors is an integer number (42905496).

Almost surely, 2^221301983 is an apocalyptic number.

221301983 is a deficient number, since it is larger than the sum of its proper divisors (36130993).

221301983 is an equidigital number, since it uses as much as digits as its factorization.

221301983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516381 (or 4516374 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 221301983 is about 14876.2220674471. Note that the first 3 decimals coincide. The cubic root of 221301983 is about 604.8696146863.

The spelling of 221301983 in words is "two hundred twenty-one million, three hundred one thousand, nine hundred eighty-three".