2651275129 has 4 divisors (see below), whose sum is σ = 2655746676. Its totient is φ = 2646803584.

The previous prime is 2651275117. The next prime is 2651275139. The reversal of 2651275129 is 9215721562.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1540719504 + 1110555625 = 39252^2 + 33325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651275129 - 2⁹ = 2651274617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2651275091 and 2651275100.

It is not an unprimeable number, because it can be changed into a prime (2651275139) 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 in 3 ways as a sum of consecutive naturals, for example, 2234884 + ... + 2236069.

It is an arithmetic number, because the mean of its divisors is an integer number (663936669).

Almost surely, 2^2651275129 is an apocalyptic number.

It is an amenable number.

2651275129 is a deficient number, since it is larger than the sum of its proper divisors (4471547).

2651275129 is an equidigital number, since it uses as much as digits as its factorization.

2651275129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471546.

The product of its digits is 75600, while the sum is 40.

The square root of 2651275129 is about 51490.5343631235. The cubic root of 2651275129 is about 1384.0494251077.

The spelling of 2651275129 in words is "two billion, six hundred fifty-one million, two hundred seventy-five thousand, one hundred twenty-nine".