21652552 has 32 divisors (see below), whose sum is σ = 43041600. Its totient is φ = 10183104.

The previous prime is 21652537. The next prime is 21652639. The reversal of 21652552 is 25525612.

It is a super-2 number, since 2×21652552² = 937666016225408, 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 21652552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24958 + ... + 25810.

It is an arithmetic number, because the mean of its divisors is an integer number (1345050).

Almost surely, 2^21652552 is an apocalyptic number.

It is an amenable number.

21652552 is a deficient number, since it is larger than the sum of its proper divisors (21389048).

21652552 is a wasteful number, since it uses less digits than its factorization.

21652552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1041 counting only the distinct ones).

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

The square root of 21652552 is about 4653.2302758406. The cubic root of 21652552 is about 278.7210033717.

The spelling of 21652552 in words is "twenty-one million, six hundred fifty-two thousand, five hundred fifty-two".