420531322187 has 2 divisors, whose sum is σ = 420531322188. Its totient is φ = 420531322186.

The previous prime is 420531322163. The next prime is 420531322223. The reversal of 420531322187 is 781223135024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420531322187 - 2²⁸ = 420262886731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420531322187.

It is not a weakly prime, because it can be changed into another prime (420531327187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210265661093 + 210265661094.

It is an arithmetic number, because the mean of its divisors is an integer number (210265661094).

Almost surely, 2^420531322187 is an apocalyptic number.

420531322187 is a deficient number, since it is larger than the sum of its proper divisors (1).

420531322187 is an equidigital number, since it uses as much as digits as its factorization.

420531322187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 420531322187 in words is "four hundred twenty billion, five hundred thirty-one million, three hundred twenty-two thousand, one hundred eighty-seven".