2195000257 has 2 divisors, whose sum is σ = 2195000258. Its totient is φ = 2195000256.

The previous prime is 2195000233. The next prime is 2195000261. The reversal of 2195000257 is 7520005912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1584119601 + 610880656 = 39801^2 + 24716^2 .

It is a cyclic number.

It is not a de Polignac number, because 2195000257 - 2¹¹ = 2194998209 is a prime.

It is a super-2 number, since 2×2195000257² = 9636052256460132098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2195000057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097500128 + 1097500129.

It is an arithmetic number, because the mean of its divisors is an integer number (1097500129).

Almost surely, 2^2195000257 is an apocalyptic number.

It is an amenable number.

2195000257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2195000257 is an equidigital number, since it uses as much as digits as its factorization.

2195000257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 2195000257 is about 46850.8298432376. The cubic root of 2195000257 is about 1299.6054536412.

The spelling of 2195000257 in words is "two billion, one hundred ninety-five million, two hundred fifty-seven", and thus it is an aban number.