865222273 has 2 divisors, whose sum is σ = 865222274. Its totient is φ = 865222272.

The previous prime is 865222229. The next prime is 865222277. The reversal of 865222273 is 372222568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863008129 + 2214144 = 29377^2 + 1488^2 .

It is a cyclic number.

It is not a de Polignac number, because 865222273 - 2²⁵ = 831667841 is a prime.

It is not a weakly prime, because it can be changed into another prime (865222277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432611136 + 432611137.

It is an arithmetic number, because the mean of its divisors is an integer number (432611137).

Almost surely, 2^865222273 is an apocalyptic number.

It is an amenable number.

865222273 is a deficient number, since it is larger than the sum of its proper divisors (1).

865222273 is an equidigital number, since it uses as much as digits as its factorization.

865222273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 865222273 is about 29414.6608513510. The cubic root of 865222273 is about 952.8895485962.

The spelling of 865222273 in words is "eight hundred sixty-five million, two hundred twenty-two thousand, two hundred seventy-three".