2511872261 has 2 divisors, whose sum is σ = 2511872262. Its totient is φ = 2511872260.

The previous prime is 2511872249. The next prime is 2511872267. The reversal of 2511872261 is 1622781152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2230672900 + 281199361 = 47230^2 + 16769^2 .

It is a cyclic number.

It is not a de Polignac number, because 2511872261 - 2³⁰ = 1438130437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2511872267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255936130 + 1255936131.

It is an arithmetic number, because the mean of its divisors is an integer number (1255936131).

Almost surely, 2^2511872261 is an apocalyptic number.

It is an amenable number.

2511872261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2511872261 is an equidigital number, since it uses as much as digits as its factorization.

2511872261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 2511872261 is about 50118.5819931091. The cubic root of 2511872261 is about 1359.3538346577.

It can be divided in two parts, 25118 and 72261, that added together give a palindrome (97379).

The spelling of 2511872261 in words is "two billion, five hundred eleven million, eight hundred seventy-two thousand, two hundred sixty-one".