216312428831 has 2 divisors, whose sum is σ = 216312428832. Its totient is φ = 216312428830.

The previous prime is 216312428819. The next prime is 216312428833. The reversal of 216312428831 is 138824213612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216312428831 - 2⁶ = 216312428767 is a prime.

It is a super-2 number, since 2×216312428831² (a number of 23 digits) contains 22 as substring.

Together with 216312428833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216312428833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108156214415 + 108156214416.

It is an arithmetic number, because the mean of its divisors is an integer number (108156214416).

Almost surely, 2^216312428831 is an apocalyptic number.

216312428831 is a deficient number, since it is larger than the sum of its proper divisors (1).

216312428831 is an equidigital number, since it uses as much as digits as its factorization.

216312428831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The spelling of 216312428831 in words is "two hundred sixteen billion, three hundred twelve million, four hundred twenty-eight thousand, eight hundred thirty-one".