21231341 has 4 divisors (see below), whose sum is σ = 22348800. Its totient is φ = 20113884.

The previous prime is 21231313. The next prime is 21231359. The reversal of 21231341 is 14313212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21231341 - 2¹⁴ = 21214957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231391) 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, 558701 + ... + 558738.

It is an arithmetic number, because the mean of its divisors is an integer number (5587200).

Almost surely, 2^21231341 is an apocalyptic number.

It is an amenable number.

21231341 is a deficient number, since it is larger than the sum of its proper divisors (1117459).

21231341 is a wasteful number, since it uses less digits than its factorization.

21231341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117458.

The product of its digits is 144, while the sum is 17.

The square root of 21231341 is about 4607.7479314737. The cubic root of 21231341 is about 276.9018189146.

Adding to 21231341 its reverse (14313212), we get a palindrome (35544553).

The spelling of 21231341 in words is "twenty-one million, two hundred thirty-one thousand, three hundred forty-one".