216167697 has 12 divisors (see below), whose sum is σ = 323807120. Its totient is φ = 144111636.

The previous prime is 216167687. The next prime is 216167723. The reversal of 216167697 is 796761612.

It is a happy number.

216167697 is a `hidden beast` number, since 21 + 616 + 7 + 6 + 9 + 7 = 666.

It is not a de Polignac number, because 216167697 - 2¹² = 216163601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216167687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444547 + ... + 445032.

Almost surely, 2^216167697 is an apocalyptic number.

216167697 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

216167697 is a deficient number, since it is larger than the sum of its proper divisors (107639423).

216167697 is an frugal number, since it uses more digits than its factorization.

216167697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889594 (or 889582 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 216167697 is about 14702.6425175885. The cubic root of 216167697 is about 600.1552348334.

The spelling of 216167697 in words is "two hundred sixteen million, one hundred sixty-seven thousand, six hundred ninety-seven".