21271088 has 20 divisors (see below), whose sum is σ = 41319528. Its totient is φ = 10608000.

The previous prime is 21271079. The next prime is 21271139. The reversal of 21271088 is 88017212.

It is a self number, because there is not a number n which added to its sum of digits gives 21271088.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5588 + ... + 8588.

Almost surely, 2^21271088 is an apocalyptic number.

It is an amenable number.

21271088 is a deficient number, since it is larger than the sum of its proper divisors (20048440).

21271088 is a wasteful number, since it uses less digits than its factorization.

21271088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452 (or 3446 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 21271088 is about 4612.0589762057. The cubic root of 21271088 is about 277.0745063211.

The spelling of 21271088 in words is "twenty-one million, two hundred seventy-one thousand, eighty-eight".