216111346 has 16 divisors (see below), whose sum is σ = 353885760. Its totient is φ = 98163280.

The previous prime is 216111299. The next prime is 216111347. The reversal of 216111346 is 643111612.

216111346 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216111346² = 93408227739863432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216111346.

It is not an unprimeable number, because it can be changed into a prime (216111347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41475 + ... + 46393.

It is an arithmetic number, because the mean of its divisors is an integer number (22117860).

Almost surely, 2^216111346 is an apocalyptic number.

216111346 is a deficient number, since it is larger than the sum of its proper divisors (137774414).

216111346 is a wasteful number, since it uses less digits than its factorization.

216111346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6929.

The product of its digits is 864, while the sum is 25.

The square root of 216111346 is about 14700.7260364922. The cubic root of 216111346 is about 600.1030804378.

Adding to 216111346 its reverse (643111612), we get a palindrome (859222958).

The spelling of 216111346 in words is "two hundred sixteen million, one hundred eleven thousand, three hundred forty-six".