420202511 has 2 divisors, whose sum is σ = 420202512. Its totient is φ = 420202510.

The previous prime is 420202507. The next prime is 420202577. The reversal of 420202511 is 115202024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420202511 - 2² = 420202507 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420202511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420202711) 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, 210101255 + 210101256.

It is an arithmetic number, because the mean of its divisors is an integer number (210101256).

Almost surely, 2^420202511 is an apocalyptic number.

420202511 is a deficient number, since it is larger than the sum of its proper divisors (1).

420202511 is an equidigital number, since it uses as much as digits as its factorization.

420202511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 420202511 is about 20498.8416989839. The cubic root of 420202511 is about 749.0075827974.

Adding to 420202511 its reverse (115202024), we get a palindrome (535404535).

The spelling of 420202511 in words is "four hundred twenty million, two hundred two thousand, five hundred eleven".