21482875 has 8 divisors (see below), whose sum is σ = 26810784. Its totient is φ = 17186200.

The previous prime is 21482873. The next prime is 21482891. The reversal of 21482875 is 57828412.

It is not a de Polignac number, because 21482875 - 2¹ = 21482873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21482873) 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, 85807 + ... + 86056.

It is an arithmetic number, because the mean of its divisors is an integer number (3351348).

Almost surely, 2^21482875 is an apocalyptic number.

21482875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21482875 is a deficient number, since it is larger than the sum of its proper divisors (5327909).

21482875 is an equidigital number, since it uses as much as digits as its factorization.

21482875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171878 (or 171868 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 21482875 is about 4634.9622436434. The cubic root of 21482875 is about 277.9910414103.

The spelling of 21482875 in words is "twenty-one million, four hundred eighty-two thousand, eight hundred seventy-five".