21152150 has 12 divisors (see below), whose sum is σ = 39343092. Its totient is φ = 8460840.

The previous prime is 21152143. The next prime is 21152207. The reversal of 21152150 is 5125112.

It is a congruent 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, 211472 + ... + 211571.

It is an arithmetic number, because the mean of its divisors is an integer number (3278591).

Almost surely, 2^21152150 is an apocalyptic number.

21152150 is a deficient number, since it is larger than the sum of its proper divisors (18190942).

21152150 is a wasteful number, since it uses less digits than its factorization.

21152150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423055 (or 423050 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 21152150 is about 4599.1466599794. The cubic root of 21152150 is about 276.5571169965.

Adding to 21152150 its reverse (5125112), we get a palindrome (26277262).

The spelling of 21152150 in words is "twenty-one million, one hundred fifty-two thousand, one hundred fifty".