16531697 has 8 divisors (see below), whose sum is σ = 20346816. Its totient is φ = 13079952.

The previous prime is 16531679. The next prime is 16531709. The reversal of 16531697 is 79613561.

16531697 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 16531697 - 2¹⁶ = 16466161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16531697.

It is not an unprimeable number, because it can be changed into a prime (16531597) 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, 90743 + ... + 90924.

It is an arithmetic number, because the mean of its divisors is an integer number (2543352).

Almost surely, 2^16531697 is an apocalyptic number.

It is an amenable number.

16531697 is a deficient number, since it is larger than the sum of its proper divisors (3815119).

16531697 is a wasteful number, since it uses less digits than its factorization.

16531697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181687.

The product of its digits is 34020, while the sum is 38.

The square root of 16531697 is about 4065.9189613174. The cubic root of 16531697 is about 254.7450842255.

The spelling of 16531697 in words is "sixteen million, five hundred thirty-one thousand, six hundred ninety-seven".