21282522 has 16 divisors (see below), whose sum is σ = 42891552. Its totient is φ = 7039760.

The previous prime is 21282517. The next prime is 21282529. The reversal of 21282522 is 22528212.

It is a junction number, because it is equal to n+sod(n) for n = 21282492 and 21282501.

It is not an unprimeable number, because it can be changed into a prime (21282529) 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, 12753 + ... + 14324.

It is an arithmetic number, because the mean of its divisors is an integer number (2680722).

Almost surely, 2^21282522 is an apocalyptic number.

21282522 is an abundant number, since it is smaller than the sum of its proper divisors (21609030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21282522 is a wasteful number, since it uses less digits than its factorization.

21282522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27213.

The product of its digits is 1280, while the sum is 24.

The square root of 21282522 is about 4613.2983861875. The cubic root of 21282522 is about 277.1241433750.

The spelling of 21282522 in words is "twenty-one million, two hundred eighty-two thousand, five hundred twenty-two".