421332133 has 2 divisors, whose sum is σ = 421332134. Its totient is φ = 421332132.

The previous prime is 421332091. The next prime is 421332137. The reversal of 421332133 is 331233124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397683364 + 23648769 = 19942^2 + 4863^2 .

It is a cyclic number.

It is not a de Polignac number, because 421332133 - 2¹³ = 421323941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421332137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210666066 + 210666067.

It is an arithmetic number, because the mean of its divisors is an integer number (210666067).

Almost surely, 2^421332133 is an apocalyptic number.

It is an amenable number.

421332133 is a deficient number, since it is larger than the sum of its proper divisors (1).

421332133 is an equidigital number, since it uses as much as digits as its factorization.

421332133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 22.

The square root of 421332133 is about 20526.3765190060. The cubic root of 421332133 is about 749.6781629513.

Adding to 421332133 its reverse (331233124), we get a palindrome (752565257).

Subtracting from 421332133 its reverse (331233124), we obtain a palindrome (90099009).

The spelling of 421332133 in words is "four hundred twenty-one million, three hundred thirty-two thousand, one hundred thirty-three".