2005501301251 has 4 divisors (see below), whose sum is σ = 2292001487152. Its totient is φ = 1719001115352.

The previous prime is 2005501301239. The next prime is 2005501301299. The reversal of 2005501301251 is 1521031055002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005501301251 - 2⁹ = 2005501300739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005501341251) 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, 143250092940 + ... + 143250092953.

It is an arithmetic number, because the mean of its divisors is an integer number (573000371788).

Almost surely, 2^{2005501301251} is an apocalyptic number.

2005501301251 is a deficient number, since it is larger than the sum of its proper divisors (286500185901).

2005501301251 is an equidigital number, since it uses as much as digits as its factorization.

2005501301251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286500185900.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 2005501301251 its reverse (1521031055002), we get a palindrome (3526532356253).

The spelling of 2005501301251 in words is "two trillion, five billion, five hundred one million, three hundred one thousand, two hundred fifty-one".