216687214311 has 4 divisors (see below), whose sum is σ = 288916285752. Its totient is φ = 144458142872.

The previous prime is 216687214283. The next prime is 216687214339. The reversal of 216687214311 is 113412786612.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (216687214283) and next prime (216687214339).

It is a cyclic number.

It is not a de Polignac number, because 216687214311 - 2¹⁹ = 216686690023 is a prime.

It is a super-2 number, since 2×216687214311² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216687214391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36114535716 + ... + 36114535721.

It is an arithmetic number, because the mean of its divisors is an integer number (72229071438).

Almost surely, 2^216687214311 is an apocalyptic number.

216687214311 is a deficient number, since it is larger than the sum of its proper divisors (72229071441).

216687214311 is an equidigital number, since it uses as much as digits as its factorization.

216687214311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72229071440.

The product of its digits is 96768, while the sum is 42.

The spelling of 216687214311 in words is "two hundred sixteen billion, six hundred eighty-seven million, two hundred fourteen thousand, three hundred eleven".