21483233 has 2 divisors, whose sum is σ = 21483234. Its totient is φ = 21483232.

The previous prime is 21483211. The next prime is 21483239. The reversal of 21483233 is 33238412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20729809 + 753424 = 4553^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 21483233 - 2⁶ = 21483169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21483239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10741616 + 10741617.

It is an arithmetic number, because the mean of its divisors is an integer number (10741617).

Almost surely, 2^21483233 is an apocalyptic number.

It is an amenable number.

21483233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21483233 is an equidigital number, since it uses as much as digits as its factorization.

21483233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 21483233 is about 4635.0008629988. Note that the first 3 decimals coincide. The cubic root of 21483233 is about 277.9925855897.

The spelling of 21483233 in words is "twenty-one million, four hundred eighty-three thousand, two hundred thirty-three".