216351697 has 8 divisors (see below), whose sum is σ = 226478592. Its totient is φ = 206421600.

The previous prime is 216351661. The next prime is 216351713. The reversal of 216351697 is 796153612.

216351697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 216351697 - 2¹¹ = 216349649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216351647) 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, 46948 + ... + 51349.

It is an arithmetic number, because the mean of its divisors is an integer number (28309824).

Almost surely, 2^216351697 is an apocalyptic number.

It is an amenable number.

216351697 is a deficient number, since it is larger than the sum of its proper divisors (10126895).

216351697 is an equidigital number, since it uses as much as digits as its factorization.

216351697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98399.

The product of its digits is 68040, while the sum is 40.

The square root of 216351697 is about 14708.8985651544. The cubic root of 216351697 is about 600.3254687886.

It can be divided in two parts, 21635 and 1697, that added together give a palindrome (23332).

The spelling of 216351697 in words is "two hundred sixteen million, three hundred fifty-one thousand, six hundred ninety-seven".