421303133 has 2 divisors, whose sum is σ = 421303134. Its totient is φ = 421303132.

The previous prime is 421303123. The next prime is 421303151. The reversal of 421303133 is 331303124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294019609 + 127283524 = 17147^2 + 11282^2 .

It is a cyclic number.

It is not a de Polignac number, because 421303133 - 2⁴ = 421303117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421303123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210651566 + 210651567.

It is an arithmetic number, because the mean of its divisors is an integer number (210651567).

Almost surely, 2^421303133 is an apocalyptic number.

It is an amenable number.

421303133 is a deficient number, since it is larger than the sum of its proper divisors (1).

421303133 is an equidigital number, since it uses as much as digits as its factorization.

421303133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 421303133 is about 20525.6700986837. The cubic root of 421303133 is about 749.6609626131.

Adding to 421303133 its reverse (331303124), we get a palindrome (752606257).

Subtracting from 421303133 its reverse (331303124), we obtain a palindrome (90000009).

The spelling of 421303133 in words is "four hundred twenty-one million, three hundred three thousand, one hundred thirty-three".