221734193 has 2 divisors, whose sum is σ = 221734194. Its totient is φ = 221734192.

The previous prime is 221734189. The next prime is 221734211. The reversal of 221734193 is 391437122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190909489 + 30824704 = 13817^2 + 5552^2 .

It is a cyclic number.

It is not a de Polignac number, because 221734193 - 2² = 221734189 is a prime.

It is a super-2 number, since 2×221734193² = 98332104690722498, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221734393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110867096 + 110867097.

It is an arithmetic number, because the mean of its divisors is an integer number (110867097).

Almost surely, 2^221734193 is an apocalyptic number.

It is an amenable number.

221734193 is a deficient number, since it is larger than the sum of its proper divisors (1).

221734193 is an equidigital number, since it uses as much as digits as its factorization.

221734193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 221734193 is about 14890.7418552603. The cubic root of 221734193 is about 605.2631353148.

The spelling of 221734193 in words is "two hundred twenty-one million, seven hundred thirty-four thousand, one hundred ninety-three".