21127150 has 48 divisors (see below), whose sum is σ = 43390080. Its totient is φ = 7589600.

The previous prime is 21127121. The next prime is 21127159. The reversal of 21127150 is 5172112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21127159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58671 + ... + 59029.

It is an arithmetic number, because the mean of its divisors is an integer number (903960).

Almost surely, 2^21127150 is an apocalyptic number.

21127150 is an abundant number, since it is smaller than the sum of its proper divisors (22262930).

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

21127150 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (21127149) it forms an eRAP, since the sums of their prime factors are consecutive (488 and 489).

21127150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 21127150 is about 4596.4279609279. The cubic root of 21127150 is about 276.4481185637.

Adding to 21127150 its reverse (5172112), we get a palindrome (26299262).

The spelling of 21127150 in words is "twenty-one million, one hundred twenty-seven thousand, one hundred fifty".