216111040 has 28 divisors (see below), whose sum is σ = 514615176. Its totient is φ = 86444288.

The previous prime is 216111019. The next prime is 216111083. The reversal of 216111040 is 40111612.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337354 + ... + 337993.

Almost surely, 2^216111040 is an apocalyptic number.

216111040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216111040 is an abundant number, since it is smaller than the sum of its proper divisors (298504136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216111040 is an equidigital number, since it uses as much as digits as its factorization.

216111040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675364 (or 675354 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 216111040 is about 14700.7156288393. The cubic root of 216111040 is about 600.1027972017.

Adding to 216111040 its reverse (40111612), we get a palindrome (256222652).

The spelling of 216111040 in words is "two hundred sixteen million, one hundred eleven thousand, forty".