21532150 has 48 divisors (see below), whose sum is σ = 41899104. Its totient is φ = 8225280.

The previous prime is 21532097. The next prime is 21532169. The reversal of 21532150 is 5123512.

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 23 ways as a sum of consecutive naturals, for example, 190494 + ... + 190606.

It is an arithmetic number, because the mean of its divisors is an integer number (872898).

Almost surely, 2^21532150 is an apocalyptic number.

21532150 is a deficient number, since it is larger than the sum of its proper divisors (20366954).

21532150 is a wasteful number, since it uses less digits than its factorization.

21532150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 21532150 is about 4640.2747763468. The cubic root of 21532150 is about 278.2034206334.

Adding to 21532150 its reverse (5123512), we get a palindrome (26655662).

The spelling of 21532150 in words is "twenty-one million, five hundred thirty-two thousand, one hundred fifty".