2750000261 has 2 divisors, whose sum is σ = 2750000262. Its totient is φ = 2750000260.

The previous prime is 2750000249. The next prime is 2750000263. The reversal of 2750000261 is 1620000572.

2750000261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2723796100 + 26204161 = 52190^2 + 5119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2750000261 is a prime.

It is a super-3 number, since 3×2750000261³ (a number of 29 digits) contains 333 as substring.

Together with 2750000263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2750000263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375000130 + 1375000131.

It is an arithmetic number, because the mean of its divisors is an integer number (1375000131).

Almost surely, 2^2750000261 is an apocalyptic number.

It is an amenable number.

2750000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2750000261 is an equidigital number, since it uses as much as digits as its factorization.

2750000261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2750000261 is about 52440.4448970449. Note that the first 3 decimals coincide. The cubic root of 2750000261 is about 1401.0197096509.

The spelling of 2750000261 in words is "two billion, seven hundred fifty million, two hundred sixty-one", and thus it is an aban number.