216054331 has 4 divisors (see below), whose sum is σ = 216951064. Its totient is φ = 215157600.

The previous prime is 216054329. The next prime is 216054361. The reversal of 216054331 is 133450612.

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

It is a cyclic number.

It is not a de Polignac number, because 216054331 - 2¹ = 216054329 is a prime.

It is a super-2 number, since 2×216054331² = 93358947887715122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216054296 and 216054305.

It is not an unprimeable number, because it can be changed into a prime (216054361) 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, 448005 + ... + 448486.

It is an arithmetic number, because the mean of its divisors is an integer number (54237766).

Almost surely, 2^216054331 is an apocalyptic number.

216054331 is a deficient number, since it is larger than the sum of its proper divisors (896733).

216054331 is an equidigital number, since it uses as much as digits as its factorization.

216054331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896732.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 216054331 is about 14698.7867186377. The cubic root of 216054331 is about 600.0503022642.

The spelling of 216054331 in words is "two hundred sixteen million, fifty-four thousand, three hundred thirty-one".