21153200 has 30 divisors (see below), whose sum is σ = 50821524. Its totient is φ = 8461120.

The previous prime is 21153199. The next prime is 21153227. The reversal of 21153200 is 235112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26042 + ... + 26841.

Almost surely, 2^21153200 is an apocalyptic number.

21153200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21153200 is an abundant number, since it is smaller than the sum of its proper divisors (29668324).

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

21153200 is a wasteful number, since it uses less digits than its factorization.

21153200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52901 (or 52890 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 21153200 is about 4599.2608101737. The cubic root of 21153200 is about 276.5616930509.

Adding to 21153200 its reverse (235112), we get a palindrome (21388312).

The spelling of 21153200 in words is "twenty-one million, one hundred fifty-three thousand, two hundred".