21552652 has 12 divisors (see below), whose sum is σ = 41146056. Its totient is φ = 9796640.

The previous prime is 21552637. The next prime is 21552653. The reversal of 21552652 is 25625512.

21552652 is nontrivially palindromic in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 21552652.

It is not an unprimeable number, because it can be changed into a prime (21552653) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 244873 + ... + 244960.

It is an arithmetic number, because the mean of its divisors is an integer number (3428838).

Almost surely, 2^21552652 is an apocalyptic number.

21552652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21552652 is a deficient number, since it is larger than the sum of its proper divisors (19593404).

21552652 is a wasteful number, since it uses less digits than its factorization.

21552652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489848 (or 489846 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 21552652 is about 4642.4833871539. The cubic root of 21552652 is about 278.2916904564.

The spelling of 21552652 in words is "twenty-one million, five hundred fifty-two thousand, six hundred fifty-two".