21551341 has 8 divisors (see below), whose sum is σ = 24700160. Its totient is φ = 18420048.

The previous prime is 21551323. The next prime is 21551351. The reversal of 21551341 is 14315512.

It is a happy number.

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 21551341 - 2⁹ = 21550829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21551351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1626 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (3087520).

Almost surely, 2^21551341 is an apocalyptic number.

It is an amenable number.

21551341 is a deficient number, since it is larger than the sum of its proper divisors (3148819).

21551341 is an equidigital number, since it uses as much as digits as its factorization.

21551341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8763.

The product of its digits is 600, while the sum is 22.

The square root of 21551341 is about 4642.3421890248. The cubic root of 21551341 is about 278.2860477199.

Adding to 21551341 its reverse (14315512), we get a palindrome (35866853).

The spelling of 21551341 in words is "twenty-one million, five hundred fifty-one thousand, three hundred forty-one".