21600159 has 8 divisors (see below), whose sum is σ = 32914560. Its totient is φ = 12342936.

The previous prime is 21600133. The next prime is 21600167. The reversal of 21600159 is 95100612.

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

It is not a de Polignac number, because 21600159 - 2⁷ = 21600031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21600559) 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, 514269 + ... + 514310.

It is an arithmetic number, because the mean of its divisors is an integer number (4114320).

Almost surely, 2^21600159 is an apocalyptic number.

21600159 is a deficient number, since it is larger than the sum of its proper divisors (11314401).

21600159 is a wasteful number, since it uses less digits than its factorization.

21600159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028589.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 21600159 is about 4647.5971210939. The cubic root of 21600159 is about 278.4960133601.

The spelling of 21600159 in words is "twenty-one million, six hundred thousand, one hundred fifty-nine".