423421051 has 2 divisors, whose sum is σ = 423421052. Its totient is φ = 423421050.

The previous prime is 423421049. The next prime is 423421087. The reversal of 423421051 is 150124324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423421051 - 2¹ = 423421049 is a prime.

Together with 423421049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (423421951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211710525 + 211710526.

It is an arithmetic number, because the mean of its divisors is an integer number (211710526).

Almost surely, 2^423421051 is an apocalyptic number.

423421051 is a deficient number, since it is larger than the sum of its proper divisors (1).

423421051 is an equidigital number, since it uses as much as digits as its factorization.

423421051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 423421051 is about 20577.1973553251. The cubic root of 423421051 is about 750.9150614663.

Adding to 423421051 its reverse (150124324), we get a palindrome (573545375).

The spelling of 423421051 in words is "four hundred twenty-three million, four hundred twenty-one thousand, fifty-one".