802307221 has 2 divisors, whose sum is σ = 802307222. Its totient is φ = 802307220.

The previous prime is 802307213. The next prime is 802307239. The reversal of 802307221 is 122703208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436350321 + 365956900 = 20889^2 + 19130^2 .

It is a cyclic number.

It is not a de Polignac number, because 802307221 - 2³ = 802307213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (802307291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401153610 + 401153611.

It is an arithmetic number, because the mean of its divisors is an integer number (401153611).

Almost surely, 2^802307221 is an apocalyptic number.

It is an amenable number.

802307221 is a deficient number, since it is larger than the sum of its proper divisors (1).

802307221 is an equidigital number, since it uses as much as digits as its factorization.

802307221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 802307221 is about 28325.0281729780. The cubic root of 802307221 is about 929.2093410990.

The spelling of 802307221 in words is "eight hundred two million, three hundred seven thousand, two hundred twenty-one".