421334233 has 2 divisors, whose sum is σ = 421334234. Its totient is φ = 421334232.

The previous prime is 421334227. The next prime is 421334261. The reversal of 421334233 is 332433124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255104784 + 166229449 = 15972^2 + 12893^2 .

It is a cyclic number.

It is not a de Polignac number, because 421334233 - 2¹³ = 421326041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421334198 and 421334207.

It is not a weakly prime, because it can be changed into another prime (421338233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210667116 + 210667117.

It is an arithmetic number, because the mean of its divisors is an integer number (210667117).

Almost surely, 2^421334233 is an apocalyptic number.

It is an amenable number.

421334233 is a deficient number, since it is larger than the sum of its proper divisors (1).

421334233 is an equidigital number, since it uses as much as digits as its factorization.

421334233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 25.

The square root of 421334233 is about 20526.4276726370. The cubic root of 421334233 is about 749.6794084624.

Adding to 421334233 its reverse (332433124), we get a palindrome (753767357).

The spelling of 421334233 in words is "four hundred twenty-one million, three hundred thirty-four thousand, two hundred thirty-three".