16123216 has 10 divisors (see below), whose sum is σ = 31238762.
Its totient is φ = 8061600.
The previous prime is 16123213. The next prime is 16123241. The reversal of 16123216 is 61232161.
It can be written as a sum of positive squares in only one way, i.e., 11696400 + 4426816 = 3420^2 + 2104^2
It is an alternating number because its digits alternate between odd and even.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (16123213) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503835 + ... + 503866.
Almost surely, 216123216 is an apocalyptic number.
16123216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
16123216 is a deficient number, since it is larger than the sum of its proper divisors (15115546).
16123216 is a wasteful number, since it uses less digits than its factorization.
16123216 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1007709 (or 1007703 counting only the distinct ones).
The product of its digits is 432, while the sum is 22.
The square root of 16123216 is about 4015.3724609306.
The cubic root of 16123216 is about 252.6294000665.
Adding to 16123216 its reverse (61232161), we get a palindrome (77355377).
The spelling of 16123216 in words is "sixteen million, one hundred twenty-three thousand, two hundred sixteen".