420223151 has 2 divisors, whose sum is σ = 420223152. Its totient is φ = 420223150.

The previous prime is 420223123. The next prime is 420223159. The reversal of 420223151 is 151322024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420223151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420223159) 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, 210111575 + 210111576.

It is an arithmetic number, because the mean of its divisors is an integer number (210111576).

Almost surely, 2^420223151 is an apocalyptic number.

420223151 is a deficient number, since it is larger than the sum of its proper divisors (1).

420223151 is an equidigital number, since it uses as much as digits as its factorization.

420223151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 420223151 is about 20499.3451358818. The cubic root of 420223151 is about 749.0198461411.

Adding to 420223151 its reverse (151322024), we get a palindrome (571545175).

The spelling of 420223151 in words is "four hundred twenty million, two hundred twenty-three thousand, one hundred fifty-one".