21282353 has 2 divisors, whose sum is σ = 21282354. Its totient is φ = 21282352.

The previous prime is 21282343. The next prime is 21282361. The reversal of 21282353 is 35328212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 1149184 = 4487^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 21282353 - 2¹⁰ = 21281329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21282343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10641176 + 10641177.

It is an arithmetic number, because the mean of its divisors is an integer number (10641177).

Almost surely, 2^21282353 is an apocalyptic number.

It is an amenable number.

21282353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21282353 is an equidigital number, since it uses as much as digits as its factorization.

21282353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 21282353 is about 4613.2800695384. The cubic root of 21282353 is about 277.1234098450.

The spelling of 21282353 in words is "twenty-one million, two hundred eighty-two thousand, three hundred fifty-three".