21282150 has 48 divisors (see below), whose sum is σ = 53795664. Its totient is φ = 5566080.

The previous prime is 21282139. The next prime is 21282167. The reversal of 21282150 is 5128212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6612 + ... + 9288.

It is an arithmetic number, because the mean of its divisors is an integer number (1120743).

Almost surely, 2^21282150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21282150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26897832).

21282150 is an abundant number, since it is smaller than the sum of its proper divisors (32513514).

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

21282150 is a wasteful number, since it uses less digits than its factorization.

21282150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 21282150 is about 4613.2580677868. The cubic root of 21282150 is about 277.1225287358.

It can be divided in two parts, 2128 and 2150, that added together give a triangular number (4278 = T₉₂).

The spelling of 21282150 in words is "twenty-one million, two hundred eighty-two thousand, one hundred fifty".