16213538 has 16 divisors (see below), whose sum is σ = 26653536. Its totient is φ = 7335840.

The previous prime is 16213513. The next prime is 16213553. The reversal of 16213538 is 83531261.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16213538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3545 + ... + 6707.

It is an arithmetic number, because the mean of its divisors is an integer number (1665846).

Almost surely, 2^16213538 is an apocalyptic number.

16213538 is a deficient number, since it is larger than the sum of its proper divisors (10439998).

16213538 is a wasteful number, since it uses less digits than its factorization.

16213538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409.

The product of its digits is 4320, while the sum is 29.

The square root of 16213538 is about 4026.6037798621. The cubic root of 16213538 is about 253.1002638633.

Adding to 16213538 its reverse (83531261), we get a palindrome (99744799).

The spelling of 16213538 in words is "sixteen million, two hundred thirteen thousand, five hundred thirty-eight".