16688031 has 8 divisors (see below), whose sum is σ = 22296960. Its totient is φ = 11102232.

The previous prime is 16688017. The next prime is 16688047. The reversal of 16688031 is 13088661.

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

It is not a de Polignac number, because 16688031 - 2¹¹ = 16685983 is a prime.

It is a super-2 number, since 2×16688031² = 556980757313922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16687983 and 16688001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16688011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4021 + ... + 7038.

It is an arithmetic number, because the mean of its divisors is an integer number (2787120).

Almost surely, 2^16688031 is an apocalyptic number.

16688031 is a deficient number, since it is larger than the sum of its proper divisors (5608929).

16688031 is a wasteful number, since it uses less digits than its factorization.

16688031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11565.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 16688031 is about 4085.0986524195. The cubic root of 16688031 is about 255.5455754627.

The spelling of 16688031 in words is "sixteen million, six hundred eighty-eight thousand, thirty-one".