216834297 has 4 divisors (see below), whose sum is σ = 289112400. Its totient is φ = 144556196.

The previous prime is 216834287. The next prime is 216834307. The reversal of 216834297 is 792438612.

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 an interprime number because it is at equal distance from previous prime (216834287) and next prime (216834307).

It is a cyclic number.

It is not a de Polignac number, because 216834297 - 2⁷ = 216834169 is a prime.

It is a super-2 number, since 2×216834297² = 94034224710968418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216834217) 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, 36139047 + ... + 36139052.

It is an arithmetic number, because the mean of its divisors is an integer number (72278100).

Almost surely, 2^216834297 is an apocalyptic number.

It is an amenable number.

216834297 is a deficient number, since it is larger than the sum of its proper divisors (72278103).

216834297 is an equidigital number, since it uses as much as digits as its factorization.

216834297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72278102.

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

The square root of 216834297 is about 14725.2944622510. The cubic root of 216834297 is about 600.7715047644.

The spelling of 216834297 in words is "two hundred sixteen million, eight hundred thirty-four thousand, two hundred ninety-seven".