251071043259 has 4 divisors (see below), whose sum is σ = 334761391016. Its totient is φ = 167380695504.

The previous prime is 251071043239. The next prime is 251071043263. The reversal of 251071043259 is 952340170152.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 251071043259 - 2¹⁶ = 251070977723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251071043239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41845173874 + ... + 41845173879.

It is an arithmetic number, because the mean of its divisors is an integer number (83690347754).

Almost surely, 2^251071043259 is an apocalyptic number.

251071043259 is a deficient number, since it is larger than the sum of its proper divisors (83690347757).

251071043259 is an equidigital number, since it uses as much as digits as its factorization.

251071043259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83690347756.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 251071043259 in words is "two hundred fifty-one billion, seventy-one million, forty-three thousand, two hundred fifty-nine".