21485199 has 8 divisors (see below), whose sum is σ = 28730880. Its totient is φ = 14281496.

The previous prime is 21485171. The next prime is 21485203. The reversal of 21485199 is 99158412.

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 21485199 - 2⁷ = 21485071 is a prime.

It is a super-2 number, since 2×21485199² = 923227552139202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485119) 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, 9279 + ... + 11360.

It is an arithmetic number, because the mean of its divisors is an integer number (3591360).

Almost surely, 2^21485199 is an apocalyptic number.

21485199 is a deficient number, since it is larger than the sum of its proper divisors (7245681).

21485199 is a wasteful number, since it uses less digits than its factorization.

21485199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20989.

The product of its digits is 25920, while the sum is 39.

The square root of 21485199 is about 4635.2129400924. The cubic root of 21485199 is about 278.0010653307.

The spelling of 21485199 in words is "twenty-one million, four hundred eighty-five thousand, one hundred ninety-nine".