21282301 has 2 divisors, whose sum is σ = 21282302. Its totient is φ = 21282300.

The previous prime is 21282269. The next prime is 21282311. The reversal of 21282301 is 10328212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 1265625 = 4474^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 21282301 - 2⁵ = 21282269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21282311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10641150 + 10641151.

It is an arithmetic number, because the mean of its divisors is an integer number (10641151).

Almost surely, 2^21282301 is an apocalyptic number.

It is an amenable number.

21282301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21282301 is an equidigital number, since it uses as much as digits as its factorization.

21282301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21282301 is about 4613.2744336317. The cubic root of 21282301 is about 277.1231841427.

The spelling of 21282301 in words is "twenty-one million, two hundred eighty-two thousand, three hundred one".