21982552 has 8 divisors (see below), whose sum is σ = 41217300. Its totient is φ = 10991272.

The previous prime is 21982537. The next prime is 21982567. The reversal of 21982552 is 25528912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21982537) and next prime (21982567).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1373902 + ... + 1373917.

Almost surely, 2^21982552 is an apocalyptic number.

It is an amenable number.

21982552 is a deficient number, since it is larger than the sum of its proper divisors (19234748).

21982552 is a wasteful number, since it uses less digits than its factorization.

21982552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747825 (or 2747821 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 21982552 is about 4688.5554278477. Note that the first 3 decimals coincide. The cubic root of 21982552 is about 280.1298377433.

The spelling of 21982552 in words is "twenty-one million, nine hundred eighty-two thousand, five hundred fifty-two".