216572211067 has 4 divisors (see below), whose sum is σ = 223558411456. Its totient is φ = 209586010680.

The previous prime is 216572210989. The next prime is 216572211073. The reversal of 216572211067 is 760112275612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216572211067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216572211077) 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, 3493100148 + ... + 3493100209.

It is an arithmetic number, because the mean of its divisors is an integer number (55889602864).

Almost surely, 2^216572211067 is an apocalyptic number.

216572211067 is a deficient number, since it is larger than the sum of its proper divisors (6986200389).

216572211067 is an equidigital number, since it uses as much as digits as its factorization.

216572211067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986200388.

The product of its (nonzero) digits is 70560, while the sum is 40.

Adding to 216572211067 its reverse (760112275612), we get a palindrome (976684486679).

The spelling of 216572211067 in words is "two hundred sixteen billion, five hundred seventy-two million, two hundred eleven thousand, sixty-seven".