255025000261 has 2 divisors, whose sum is σ = 255025000262. Its totient is φ = 255025000260.

The previous prime is 255025000231. The next prime is 255025000289. The reversal of 255025000261 is 162000520552.

It is an a-pointer prime, because the next prime (255025000289) can be obtained adding 255025000261 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230846616225 + 24178384036 = 480465^2 + 155494^2 .

It is a cyclic number.

It is not a de Polignac number, because 255025000261 - 2²⁵ = 254991445829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255025000211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127512500130 + 127512500131.

It is an arithmetic number, because the mean of its divisors is an integer number (127512500131).

Almost surely, 2^255025000261 is an apocalyptic number.

It is an amenable number.

255025000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

255025000261 is an equidigital number, since it uses as much as digits as its factorization.

255025000261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 255025000261 in words is "two hundred fifty-five billion, twenty-five million, two hundred sixty-one", and thus it is an aban number.