2195177261 has 2 divisors, whose sum is σ = 2195177262. Its totient is φ = 2195177260.

The previous prime is 2195177249. The next prime is 2195177273. The reversal of 2195177261 is 1627715912.

It is a balanced prime because it is at equal distance from previous prime (2195177249) and next prime (2195177273).

It can be written as a sum of positive squares in only one way, i.e., 1529279236 + 665898025 = 39106^2 + 25805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2195177261 is a prime.

It is a super-2 number, since 2×2195177261² = 9637606414422924242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2195177861) 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 as a sum of consecutive naturals, namely, 1097588630 + 1097588631.

It is an arithmetic number, because the mean of its divisors is an integer number (1097588631).

Almost surely, 2^2195177261 is an apocalyptic number.

It is an amenable number.

2195177261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2195177261 is an equidigital number, since it uses as much as digits as its factorization.

2195177261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 41.

The square root of 2195177261 is about 46852.7188218571. The cubic root of 2195177261 is about 1299.6403859348.

The spelling of 2195177261 in words is "two billion, one hundred ninety-five million, one hundred seventy-seven thousand, two hundred sixty-one".