216345049 has 8 divisors (see below), whose sum is σ = 217706720. Its totient is φ = 214988256.

The previous prime is 216345037. The next prime is 216345071. The reversal of 216345049 is 940543612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216345049 - 2²¹ = 214247897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216345029) 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, 124702 + ... + 126424.

It is an arithmetic number, because the mean of its divisors is an integer number (27213340).

Almost surely, 2^216345049 is an apocalyptic number.

It is an amenable number.

216345049 is a deficient number, since it is larger than the sum of its proper divisors (1361671).

216345049 is a wasteful number, since it uses less digits than its factorization.

216345049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 216345049 is about 14708.6725777685. The cubic root of 216345049 is about 600.3193198427.

The spelling of 216345049 in words is "two hundred sixteen million, three hundred forty-five thousand, forty-nine".