2801125813 has 2 divisors, whose sum is σ = 2801125814. Its totient is φ = 2801125812.

The previous prime is 2801125757. The next prime is 2801125849. The reversal of 2801125813 is 3185211082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1803955729 + 997170084 = 42473^2 + 31578^2 .

It is a cyclic number.

It is not a de Polignac number, because 2801125813 - 2²⁹ = 2264254901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2801125013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1400562906 + 1400562907.

It is an arithmetic number, because the mean of its divisors is an integer number (1400562907).

Almost surely, 2^2801125813 is an apocalyptic number.

It is an amenable number.

2801125813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2801125813 is an equidigital number, since it uses as much as digits as its factorization.

2801125813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 2801125813 is about 52925.6630851235. The cubic root of 2801125813 is about 1409.6486244467.

Adding to 2801125813 its reverse (3185211082), we get a palindrome (5986336895).

It can be divided in two parts, 28011 and 25813, that added together give a square (53824 = 232²).

The spelling of 2801125813 in words is "two billion, eight hundred one million, one hundred twenty-five thousand, eight hundred thirteen".