21625352 has 32 divisors (see below), whose sum is σ = 47838720. Its totient is φ = 8968320.

The previous prime is 21625339. The next prime is 21625367. The reversal of 21625352 is 25352612.

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, 4493 + ... + 7964.

It is an arithmetic number, because the mean of its divisors is an integer number (1494960).

Almost surely, 2^21625352 is an apocalyptic number.

It is an amenable number.

21625352 is an abundant number, since it is smaller than the sum of its proper divisors (26213368).

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

21625352 is a wasteful number, since it uses less digits than its factorization.

21625352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12501 (or 12497 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 21625352 is about 4650.3066565550. The cubic root of 21625352 is about 278.6042444169.

Adding to 21625352 its reverse (25352612), we get a palindrome (46977964).

The spelling of 21625352 in words is "twenty-one million, six hundred twenty-five thousand, three hundred fifty-two".