21314133 has 6 divisors (see below), whose sum is σ = 30787094. Its totient is φ = 14209416.

The previous prime is 21314087. The next prime is 21314149. The reversal of 21314133 is 33141312.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 5489649 = 3978^2 + 2343^2 .

It is not a de Polignac number, because 21314133 - 2¹⁶ = 21248597 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 (21314233) 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, 1184110 + ... + 1184127.

Almost surely, 2^21314133 is an apocalyptic number.

It is an amenable number.

21314133 is a deficient number, since it is larger than the sum of its proper divisors (9472961).

21314133 is a wasteful number, since it uses less digits than its factorization.

21314133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368243 (or 2368240 counting only the distinct ones).

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

The square root of 21314133 is about 4616.7231885830. The cubic root of 21314133 is about 277.2612799685.

Adding to 21314133 its reverse (33141312), we get a palindrome (54455445).

The spelling of 21314133 in words is "twenty-one million, three hundred fourteen thousand, one hundred thirty-three".