7217085853 has 2 divisors, whose sum is σ = 7217085854. Its totient is φ = 7217085852.

The previous prime is 7217085829. The next prime is 7217085919. The reversal of 7217085853 is 3585807127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3867222969 + 3349862884 = 62187^2 + 57878^2 .

It is a cyclic number.

It is not a de Polignac number, because 7217085853 - 2⁹ = 7217085341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7217086853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608542926 + 3608542927.

It is an arithmetic number, because the mean of its divisors is an integer number (3608542927).

Almost surely, 2^7217085853 is an apocalyptic number.

It is an amenable number.

7217085853 is a deficient number, since it is larger than the sum of its proper divisors (1).

7217085853 is an equidigital number, since it uses as much as digits as its factorization.

7217085853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 7217085853 is about 84953.4334385609. The cubic root of 7217085853 is about 1932.5049894130.

The spelling of 7217085853 in words is "seven billion, two hundred seventeen million, eighty-five thousand, eight hundred fifty-three".