21452152 has 16 divisors (see below), whose sum is σ = 40466160. Its totient is φ = 10661184.

The previous prime is 21452149. The next prime is 21452161. The reversal of 21452152 is 25125412.

It is a super-2 number, since 2×21452152² = 920389650862208, which contains 22 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6693 + ... + 9364.

It is an arithmetic number, because the mean of its divisors is an integer number (2529135).

Almost surely, 2^21452152 is an apocalyptic number.

It is an amenable number.

21452152 is a deficient number, since it is larger than the sum of its proper divisors (19014008).

21452152 is a wasteful number, since it uses less digits than its factorization.

21452152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16230 (or 16226 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 21452152 is about 4631.6467913691. The cubic root of 21452152 is about 277.8584583892.

Adding to 21452152 its reverse (25125412), we get a palindrome (46577564).

The spelling of 21452152 in words is "twenty-one million, four hundred fifty-two thousand, one hundred fifty-two".