21331341 has 6 divisors (see below), whose sum is σ = 30811950. Its totient is φ = 14220888.

The previous prime is 21331339. The next prime is 21331361. The reversal of 21331341 is 14313312.

It can be written as a sum of positive squares in only one way, i.e., 21206025 + 125316 = 4605^2 + 354^2 .

It is not a de Polignac number, because 21331341 - 2¹ = 21331339 is a prime.

It is a super-2 number, since 2×21331341² = 910052217716562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185066 + ... + 1185083.

It is an arithmetic number, because the mean of its divisors is an integer number (5135325).

Almost surely, 2^21331341 is an apocalyptic number.

It is an amenable number.

21331341 is a deficient number, since it is larger than the sum of its proper divisors (9480609).

21331341 is a wasteful number, since it uses less digits than its factorization.

21331341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370155 (or 2370152 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 21331341 is about 4618.5864720713. The cubic root of 21331341 is about 277.3358756791.

Adding to 21331341 its reverse (14313312), we get a palindrome (35644653).

The spelling of 21331341 in words is "twenty-one million, three hundred thirty-one thousand, three hundred forty-one".