16051321 has 8 divisors (see below), whose sum is σ = 18857664. Its totient is φ = 13469520.

The previous prime is 16051283. The next prime is 16051327. The reversal of 16051321 is 12315061.

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 16051321 - 2⁷ = 16051193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16051327) 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, 55981 + ... + 56266.

It is an arithmetic number, because the mean of its divisors is an integer number (2357208).

Almost surely, 2^16051321 is an apocalyptic number.

16051321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16051321 is a deficient number, since it is larger than the sum of its proper divisors (2806343).

16051321 is a wasteful number, since it uses less digits than its factorization.

16051321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112271.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 16051321 is about 4006.4099890051. The cubic root of 16051321 is about 252.2533408000.

Adding to 16051321 its reverse (12315061), we get a palindrome (28366382).

It can be divided in two parts, 1605 and 1321, that added together give a triangular number (2926 = T₇₆).

The spelling of 16051321 in words is "sixteen million, fifty-one thousand, three hundred twenty-one".