216351312571 has 2 divisors, whose sum is σ = 216351312572. Its totient is φ = 216351312570.

The previous prime is 216351312479. The next prime is 216351312701. The reversal of 216351312571 is 175213153612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216351312571 - 2²⁹ = 215814441659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216351312571.

It is not a weakly prime, because it can be changed into another prime (216351312371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108175656285 + 108175656286.

It is an arithmetic number, because the mean of its divisors is an integer number (108175656286).

Almost surely, 2^216351312571 is an apocalyptic number.

216351312571 is a deficient number, since it is larger than the sum of its proper divisors (1).

216351312571 is an equidigital number, since it uses as much as digits as its factorization.

216351312571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The spelling of 216351312571 in words is "two hundred sixteen billion, three hundred fifty-one million, three hundred twelve thousand, five hundred seventy-one".