216551211334 has 8 divisors (see below), whose sum is σ = 338949722160. Its totient is φ = 103567970616.

The previous prime is 216551211319. The next prime is 216551211493. The reversal of 216551211334 is 433112155612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 216551211334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353817469 + ... + 2353817560.

It is an arithmetic number, because the mean of its divisors is an integer number (42368715270).

Almost surely, 2^216551211334 is an apocalyptic number.

216551211334 is a deficient number, since it is larger than the sum of its proper divisors (122398510826).

216551211334 is a wasteful number, since it uses less digits than its factorization.

216551211334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4707635054.

The product of its digits is 21600, while the sum is 34.

Adding to 216551211334 its reverse (433112155612), we get a palindrome (649663366946).

The spelling of 216551211334 in words is "two hundred sixteen billion, five hundred fifty-one million, two hundred eleven thousand, three hundred thirty-four".