21559485 has 32 divisors (see below), whose sum is σ = 37169280. Its totient is φ = 10631168.

The previous prime is 21559463. The next prime is 21559513. The reversal of 21559485 is 58495512.

It is a cyclic number.

It is not a de Polignac number, because 21559485 - 2⁹ = 21558973 is a prime.

It is a super-2 number, since 2×21559485² = 929622786930450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14329 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (1161540).

Almost surely, 2^21559485 is an apocalyptic number.

It is an amenable number.

21559485 is a deficient number, since it is larger than the sum of its proper divisors (15609795).

21559485 is a wasteful number, since it uses less digits than its factorization.

21559485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its digits is 72000, while the sum is 39.

The square root of 21559485 is about 4643.2192496155. The cubic root of 21559485 is about 278.3210969876.

The spelling of 21559485 in words is "twenty-one million, five hundred fifty-nine thousand, four hundred eighty-five".