221079233 has 2 divisors, whose sum is σ = 221079234. Its totient is φ = 221079232.

The previous prime is 221079223. The next prime is 221079247. The reversal of 221079233 is 332970122.

221079233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156550144 + 64529089 = 12512^2 + 8033^2 .

It is a cyclic number.

It is not a de Polignac number, because 221079233 - 2²⁴ = 204302017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221079196 and 221079205.

It is not a weakly prime, because it can be changed into another prime (221079223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110539616 + 110539617.

It is an arithmetic number, because the mean of its divisors is an integer number (110539617).

Almost surely, 2^221079233 is an apocalyptic number.

It is an amenable number.

221079233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221079233 is an equidigital number, since it uses as much as digits as its factorization.

221079233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 221079233 is about 14868.7334026809. The cubic root of 221079233 is about 604.6666040978. Note that the first 4 decimals are identical.

The spelling of 221079233 in words is "two hundred twenty-one million, seventy-nine thousand, two hundred thirty-three".