2197570261 has 2 divisors, whose sum is σ = 2197570262. Its totient is φ = 2197570260.

The previous prime is 2197570241. The next prime is 2197570303. The reversal of 2197570261 is 1620757912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2137212900 + 60357361 = 46230^2 + 7769^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197570261 - 2³¹ = 50086613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197570241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098785130 + 1098785131.

It is an arithmetic number, because the mean of its divisors is an integer number (1098785131).

Almost surely, 2^2197570261 is an apocalyptic number.

It is an amenable number.

2197570261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197570261 is an equidigital number, since it uses as much as digits as its factorization.

2197570261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 2197570261 is about 46878.2493380459. The cubic root of 2197570261 is about 1300.1124677845.

The spelling of 2197570261 in words is "two billion, one hundred ninety-seven million, five hundred seventy thousand, two hundred sixty-one".