21552153 has 8 divisors (see below), whose sum is σ = 32841408. Its totient is φ = 12315504.

The previous prime is 21552143. The next prime is 21552197. The reversal of 21552153 is 35125512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21552153 - 2⁹ = 21551641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21552143) 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 7 ways as a sum of consecutive naturals, for example, 513126 + ... + 513167.

It is an arithmetic number, because the mean of its divisors is an integer number (4105176).

Almost surely, 2^21552153 is an apocalyptic number.

It is an amenable number.

21552153 is a deficient number, since it is larger than the sum of its proper divisors (11289255).

21552153 is a wasteful number, since it uses less digits than its factorization.

21552153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026303.

The product of its digits is 1500, while the sum is 24.

The square root of 21552153 is about 4642.4296440549. The cubic root of 21552153 is about 278.2895427141.

Adding to 21552153 its reverse (35125512), we get a palindrome (56677665).

The spelling of 21552153 in words is "twenty-one million, five hundred fifty-two thousand, one hundred fifty-three".