21482250 has 32 divisors (see below), whose sum is σ = 53621568. Its totient is φ = 5728400.

The previous prime is 21482239. The next prime is 21482267. The reversal of 21482250 is 5228412.

It is a super-2 number, since 2×21482250² = 922974130125000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21482250.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13572 + ... + 15071.

It is an arithmetic number, because the mean of its divisors is an integer number (1675674).

Almost surely, 2^21482250 is an apocalyptic number.

21482250 is an abundant number, since it is smaller than the sum of its proper divisors (32139318).

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

21482250 is a wasteful number, since it uses less digits than its factorization.

21482250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28663 (or 28653 counting only the distinct ones).

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

The square root of 21482250 is about 4634.8948208131. The cubic root of 21482250 is about 277.9883455253.

It can be divided in two parts, 21 and 482250, that multiplied together give a triangular number (10127250 = T₄₅₀₀).

The spelling of 21482250 in words is "twenty-one million, four hundred eighty-two thousand, two hundred fifty".