16531712 has 18 divisors (see below), whose sum is σ = 32999358. Its totient is φ = 8265728.

The previous prime is 16531709. The next prime is 16531747. The reversal of 16531712 is 21713561.

It can be written as a sum of positive squares in only one way, i.e., 15241216 + 1290496 = 3904^2 + 1136^2 .

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32033 + ... + 32544.

Almost surely, 2^16531712 is an apocalyptic number.

It is an amenable number.

16531712 is a deficient number, since it is larger than the sum of its proper divisors (16467646).

16531712 is an frugal number, since it uses more digits than its factorization.

16531712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64593 (or 64579 counting only the distinct ones).

The product of its digits is 1260, while the sum is 26.

The square root of 16531712 is about 4065.9208059184. The cubic root of 16531712 is about 254.7451612730.

The spelling of 16531712 in words is "sixteen million, five hundred thirty-one thousand, seven hundred twelve".