16233621 has 8 divisors (see below), whose sum is σ = 21706560. Its totient is φ = 10791552.

The previous prime is 16233617. The next prime is 16233641. The reversal of 16233621 is 12633261.

It is a happy number.

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

It is not a de Polignac number, because 16233621 - 2² = 16233617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16233591 and 16233600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16233641) 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, 6460 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (2713320).

Almost surely, 2^16233621 is an apocalyptic number.

16233621 is the 2154-th nonagonal number.

It is an amenable number.

16233621 is a deficient number, since it is larger than the sum of its proper divisors (5472939).

16233621 is a wasteful number, since it uses less digits than its factorization.

16233621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435.

The product of its digits is 1296, while the sum is 24.

The square root of 16233621 is about 4029.0967970502. The cubic root of 16233621 is about 253.2047221529.

Adding to 16233621 its reverse (12633261), we get a palindrome (28866882).

The spelling of 16233621 in words is "sixteen million, two hundred thirty-three thousand, six hundred twenty-one".