216916497 has 24 divisors (see below), whose sum is σ = 358562880. Its totient is φ = 123786720.

The previous prime is 216916493. The next prime is 216916501. The reversal of 216916497 is 794619612.

216916497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216916493) and next prime (216916501).

It is not a de Polignac number, because 216916497 - 2² = 216916493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216916493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57454 + ... + 61112.

It is an arithmetic number, because the mean of its divisors is an integer number (14940120).

Almost surely, 2^216916497 is an apocalyptic number.

It is an amenable number.

216916497 is a deficient number, since it is larger than the sum of its proper divisors (141646383).

216916497 is a wasteful number, since it uses less digits than its factorization.

216916497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613 (or 4610 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 216916497 is about 14728.0853134411. The cubic root of 216916497 is about 600.8474109277.

The spelling of 216916497 in words is "two hundred sixteen million, nine hundred sixteen thousand, four hundred ninety-seven".