21271352 has 32 divisors (see below), whose sum is σ = 42476400. Its totient is φ = 9951744.

The previous prime is 21271351. The next prime is 21271379. The reversal of 21271352 is 25317212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21271351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30803 + ... + 31485.

Almost surely, 2^21271352 is an apocalyptic number.

It is an amenable number.

21271352 is a deficient number, since it is larger than the sum of its proper divisors (21205048).

21271352 is a wasteful number, since it uses less digits than its factorization.

21271352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935 (or 931 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 21271352 is about 4612.0875967397. The cubic root of 21271352 is about 277.0756525933.

Adding to 21271352 its reverse (25317212), we get a palindrome (46588564).

The spelling of 21271352 in words is "twenty-one million, two hundred seventy-one thousand, three hundred fifty-two".