42506210501 has 2 divisors, whose sum is σ = 42506210502. Its totient is φ = 42506210500.

The previous prime is 42506210443. The next prime is 42506210521. The reversal of 42506210501 is 10501260524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22569052900 + 19937157601 = 150230^2 + 141199^2 .

It is a cyclic number.

It is not a de Polignac number, because 42506210501 - 2¹⁰ = 42506209477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42506210521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21253105250 + 21253105251.

It is an arithmetic number, because the mean of its divisors is an integer number (21253105251).

Almost surely, 2^42506210501 is an apocalyptic number.

It is an amenable number.

42506210501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42506210501 is an equidigital number, since it uses as much as digits as its factorization.

42506210501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 42506210501 in words is "forty-two billion, five hundred six million, two hundred ten thousand, five hundred one".