216234897 has 4 divisors (see below), whose sum is σ = 288313200. Its totient is φ = 144156596.

The previous prime is 216234871. The next prime is 216234911. The reversal of 216234897 is 798432612.

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 216234897 - 2⁷ = 216234769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216234847) 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, 36039147 + ... + 36039152.

It is an arithmetic number, because the mean of its divisors is an integer number (72078300).

Almost surely, 2^216234897 is an apocalyptic number.

It is an amenable number.

216234897 is a deficient number, since it is larger than the sum of its proper divisors (72078303).

216234897 is an equidigital number, since it uses as much as digits as its factorization.

216234897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72078302.

The product of its digits is 145152, while the sum is 42.

The square root of 216234897 is about 14704.9276434806. The cubic root of 216234897 is about 600.2174184281.

The spelling of 216234897 in words is "two hundred sixteen million, two hundred thirty-four thousand, eight hundred ninety-seven".