16216693 has 8 divisors (see below), whose sum is σ = 16811960. Its totient is φ = 15629760.

The previous prime is 16216663. The next prime is 16216703. The reversal of 16216693 is 39661261.

It can be written as a sum of positive squares in 4 ways, for example, as 3090564 + 13126129 = 1758^2 + 3623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16216693 is a prime.

It is a super-2 number, since 2×16216693² = 525962263712498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16216663) 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, 2023 + ... + 6043.

It is an arithmetic number, because the mean of its divisors is an integer number (2101495).

Almost surely, 2^16216693 is an apocalyptic number.

It is an amenable number.

16216693 is a deficient number, since it is larger than the sum of its proper divisors (595267).

16216693 is a wasteful number, since it uses less digits than its factorization.

16216693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167.

The product of its digits is 11664, while the sum is 34.

The square root of 16216693 is about 4026.9955301689. The cubic root of 16216693 is about 253.1166797651.

The spelling of 16216693 in words is "sixteen million, two hundred sixteen thousand, six hundred ninety-three".