21568052 has 12 divisors (see below), whose sum is σ = 41175456. Its totient is φ = 9803640.

The previous prime is 21568049. The next prime is 21568067. The reversal of 21568052 is 25086512.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245048 + ... + 245135.

It is an arithmetic number, because the mean of its divisors is an integer number (3431288).

Almost surely, 2^21568052 is an apocalyptic number.

21568052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21568052 is a deficient number, since it is larger than the sum of its proper divisors (19607404).

21568052 is a wasteful number, since it uses less digits than its factorization.

21568052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490198 (or 490196 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 21568052 is about 4644.1416860384. The cubic root of 21568052 is about 278.3579571922.

The spelling of 21568052 in words is "twenty-one million, five hundred sixty-eight thousand, fifty-two".