305255502202139 has 4 divisors (see below), whose sum is σ = 305575812278856. Its totient is φ = 304935192125424.

The previous prime is 305255502202127. The next prime is 305255502202177. The reversal of 305255502202139 is 931202205552503.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305255502202139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 305255502202139.

It is not an unprimeable number, because it can be changed into a prime (305255502402139) 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, 160155036929 + ... + 160155038834.

It is an arithmetic number, because the mean of its divisors is an integer number (76393953069714).

Almost surely, 2^{305255502202139} is an apocalyptic number.

305255502202139 is a deficient number, since it is larger than the sum of its proper divisors (320310076717).

305255502202139 is an equidigital number, since it uses as much as digits as its factorization.

305255502202139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320310076716.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 305255502202139 in words is "three hundred five trillion, two hundred fifty-five billion, five hundred two million, two hundred two thousand, one hundred thirty-nine".