420223519 has 2 divisors, whose sum is σ = 420223520. Its totient is φ = 420223518.

The previous prime is 420223499. The next prime is 420223523. The reversal of 420223519 is 915322024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420223519 - 2⁹ = 420223007 is a prime.

It is a super-2 number, since 2×420223519² = 353175611841486722, which contains 22 as substring.

It is equal to p_22355704 and since 420223519 and 22355704 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420223579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210111759 + 210111760.

It is an arithmetic number, because the mean of its divisors is an integer number (210111760).

Almost surely, 2^420223519 is an apocalyptic number.

420223519 is a deficient number, since it is larger than the sum of its proper divisors (1).

420223519 is an equidigital number, since it uses as much as digits as its factorization.

420223519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 420223519 is about 20499.3541117763. The cubic root of 420223519 is about 749.0200647862.

The spelling of 420223519 in words is "four hundred twenty million, two hundred twenty-three thousand, five hundred nineteen".