21141343 has 4 divisors (see below), whose sum is σ = 21258328. Its totient is φ = 21024360.

The previous prime is 21141317. The next prime is 21141361. The reversal of 21141343 is 34314112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21141343 - 2¹⁷ = 21010271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21141343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58221 + ... + 58582.

It is an arithmetic number, because the mean of its divisors is an integer number (5314582).

Almost surely, 2^21141343 is an apocalyptic number.

21141343 is a deficient number, since it is larger than the sum of its proper divisors (116985).

21141343 is a wasteful number, since it uses less digits than its factorization.

21141343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116984.

The product of its digits is 288, while the sum is 19.

The square root of 21141343 is about 4597.9716180072. The cubic root of 21141343 is about 276.5100096984.

Adding to 21141343 its reverse (34314112), we get a palindrome (55455455).

The spelling of 21141343 in words is "twenty-one million, one hundred forty-one thousand, three hundred forty-three".