21600481 has 16 divisors (see below), whose sum is σ = 25659648. Its totient is φ = 17798400.

The previous prime is 21600479. The next prime is 21600487. The reversal of 21600481 is 18400612.

It is a cyclic number.

It is not a de Polignac number, because 21600481 - 2¹ = 21600479 is a prime.

It is a super-2 number, since 2×21600481² = 933161558862722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21600487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20436 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (1603728).

Almost surely, 2^21600481 is an apocalyptic number.

It is an amenable number.

21600481 is a deficient number, since it is larger than the sum of its proper divisors (4059167).

21600481 is a wasteful number, since it uses less digits than its factorization.

21600481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 21600481 is about 4647.6317625216. The cubic root of 21600481 is about 278.4973972276.

The spelling of 21600481 in words is "twenty-one million, six hundred thousand, four hundred eighty-one".