16221734 has 8 divisors (see below), whose sum is σ = 24351600. Its totient is φ = 8104536.

The previous prime is 16221727. The next prime is 16221743. The reversal of 16221734 is 43712261.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1292 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (3043950).

Almost surely, 2^16221734 is an apocalyptic number.

16221734 is a deficient number, since it is larger than the sum of its proper divisors (8129866).

16221734 is a wasteful number, since it uses less digits than its factorization.

16221734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334.

The product of its digits is 2016, while the sum is 26.

The square root of 16221734 is about 4027.6213824043. The cubic root of 16221734 is about 253.1429043678.

Adding to 16221734 its reverse (43712261), we get a palindrome (59933995).

The spelling of 16221734 in words is "sixteen million, two hundred twenty-one thousand, seven hundred thirty-four".