216259405231 has 2 divisors, whose sum is σ = 216259405232. Its totient is φ = 216259405230.

The previous prime is 216259405223. The next prime is 216259405273. The reversal of 216259405231 is 132504952612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216259405231 - 2³ = 216259405223 is a prime.

It is a super-2 number, since 2×216259405231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216259402231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108129702615 + 108129702616.

It is an arithmetic number, because the mean of its divisors is an integer number (108129702616).

Almost surely, 2^216259405231 is an apocalyptic number.

216259405231 is a deficient number, since it is larger than the sum of its proper divisors (1).

216259405231 is an equidigital number, since it uses as much as digits as its factorization.

216259405231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 216259405231 in words is "two hundred sixteen billion, two hundred fifty-nine million, four hundred five thousand, two hundred thirty-one".