221796373 has 2 divisors, whose sum is σ = 221796374. Its totient is φ = 221796372.

The previous prime is 221796359. The next prime is 221796457. The reversal of 221796373 is 373697122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212663889 + 9132484 = 14583^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 221796373 - 2¹³ = 221788181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221796343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110898186 + 110898187.

It is an arithmetic number, because the mean of its divisors is an integer number (110898187).

Almost surely, 2^221796373 is an apocalyptic number.

It is an amenable number.

221796373 is a deficient number, since it is larger than the sum of its proper divisors (1).

221796373 is an equidigital number, since it uses as much as digits as its factorization.

221796373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The square root of 221796373 is about 14892.8295833935. The cubic root of 221796373 is about 605.3197071706.

The spelling of 221796373 in words is "two hundred twenty-one million, seven hundred ninety-six thousand, three hundred seventy-three".