423044521 has 2 divisors, whose sum is σ = 423044522. Its totient is φ = 423044520.

The previous prime is 423044513. The next prime is 423044527. The reversal of 423044521 is 125440324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250778896 + 172265625 = 15836^2 + 13125^2 .

It is a cyclic number.

It is not a de Polignac number, because 423044521 - 2³ = 423044513 is a prime.

It is not a weakly prime, because it can be changed into another prime (423044527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211522260 + 211522261.

It is an arithmetic number, because the mean of its divisors is an integer number (211522261).

Almost surely, 2^423044521 is an apocalyptic number.

It is an amenable number.

423044521 is a deficient number, since it is larger than the sum of its proper divisors (1).

423044521 is an equidigital number, since it uses as much as digits as its factorization.

423044521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 423044521 is about 20568.0461152731. The cubic root of 423044521 is about 750.6924100425.

Adding to 423044521 its reverse (125440324), we get a palindrome (548484845).

The spelling of 423044521 in words is "four hundred twenty-three million, forty-four thousand, five hundred twenty-one".