21082552 has 32 divisors (see below), whose sum is σ = 42411600. Its totient is φ = 9794304.

The previous prime is 21082543. The next prime is 21082577. The reversal of 21082552 is 25528012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6748 + ... + 9364.

Almost surely, 2^21082552 is an apocalyptic number.

It is an amenable number.

21082552 is an abundant number, since it is smaller than the sum of its proper divisors (21329048).

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

21082552 is a wasteful number, since it uses less digits than its factorization.

21082552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 21082552 is about 4591.5740220539. The cubic root of 21082552 is about 276.2534603690.

The spelling of 21082552 in words is "twenty-one million, eighty-two thousand, five hundred fifty-two".