42069858251 has 2 divisors, whose sum is σ = 42069858252. Its totient is φ = 42069858250.

The previous prime is 42069858221. The next prime is 42069858253. The reversal of 42069858251 is 15285896024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42069858251 - 2¹⁰ = 42069857227 is a prime.

It is a Sophie Germain prime.

Together with 42069858253, it forms a pair of twin primes.

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 42069858251.

It is not a weakly prime, because it can be changed into another prime (42069858253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21034929125 + 21034929126.

It is an arithmetic number, because the mean of its divisors is an integer number (21034929126).

Almost surely, 2^42069858251 is an apocalyptic number.

42069858251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42069858251 is an equidigital number, since it uses as much as digits as its factorization.

42069858251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 42069858251 in words is "forty-two billion, sixty-nine million, eight hundred fifty-eight thousand, two hundred fifty-one".