216496109 has 4 divisors (see below), whose sum is σ = 216541920. Its totient is φ = 216450300.

The previous prime is 216496087. The next prime is 216496141. The reversal of 216496109 is 901694612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216496109 - 2¹⁶ = 216430573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216496199) 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, 14879 + ... + 25580.

It is an arithmetic number, because the mean of its divisors is an integer number (54135480).

Almost surely, 2^216496109 is an apocalyptic number.

It is an amenable number.

216496109 is a deficient number, since it is larger than the sum of its proper divisors (45811).

216496109 is an equidigital number, since it uses as much as digits as its factorization.

216496109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45810.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 216496109 is about 14713.8067474056. The cubic root of 216496109 is about 600.4590089470.

The spelling of 216496109 in words is "two hundred sixteen million, four hundred ninety-six thousand, one hundred nine".