21341255 has 8 divisors (see below), whose sum is σ = 27579552. Its totient is φ = 15759648.

The previous prime is 21341249. The next prime is 21341317. The reversal of 21341255 is 55214312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21341255 - 2⁶ = 21341191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21341255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164099 + ... + 164228.

It is an arithmetic number, because the mean of its divisors is an integer number (3447444).

Almost surely, 2^21341255 is an apocalyptic number.

21341255 is a deficient number, since it is larger than the sum of its proper divisors (6238297).

21341255 is a wasteful number, since it uses less digits than its factorization.

21341255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328345.

The product of its digits is 1200, while the sum is 23.

The square root of 21341255 is about 4619.6596194958. The cubic root of 21341255 is about 277.3788340977.

Adding to 21341255 its reverse (55214312), we get a palindrome (76555567).

The spelling of 21341255 in words is "twenty-one million, three hundred forty-one thousand, two hundred fifty-five".