21325152 has 24 divisors (see below), whose sum is σ = 55978776. Its totient is φ = 7108352.

The previous prime is 21325151. The next prime is 21325177. The reversal of 21325152 is 25152312.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110973 + ... + 111164.

It is an arithmetic number, because the mean of its divisors is an integer number (2332449).

Almost surely, 2^21325152 is an apocalyptic number.

It is an amenable number.

21325152 is an abundant number, since it is smaller than the sum of its proper divisors (34653624).

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

21325152 is a wasteful number, since it uses less digits than its factorization.

21325152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222150 (or 222142 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 21325152 is about 4617.9164132756. The cubic root of 21325152 is about 277.3090513339.

Adding to 21325152 its reverse (25152312), we get a palindrome (46477464).

The spelling of 21325152 in words is "twenty-one million, three hundred twenty-five thousand, one hundred fifty-two".