2197255961 has 2 divisors, whose sum is σ = 2197255962. Its totient is φ = 2197255960.

The previous prime is 2197255943. The next prime is 2197255979. The reversal of 2197255961 is 1695527912.

It is a balanced prime because it is at equal distance from previous prime (2197255943) and next prime (2197255979).

It can be written as a sum of positive squares in only one way, i.e., 2146561561 + 50694400 = 46331^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197255961 - 2¹⁰ = 2197254937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2197255061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098627980 + 1098627981.

It is an arithmetic number, because the mean of its divisors is an integer number (1098627981).

Almost surely, 2^2197255961 is an apocalyptic number.

It is an amenable number.

2197255961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197255961 is an equidigital number, since it uses as much as digits as its factorization.

2197255961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 47.

The square root of 2197255961 is about 46874.8969172200. The cubic root of 2197255961 is about 1300.0504834439.

The spelling of 2197255961 in words is "two billion, one hundred ninety-seven million, two hundred fifty-five thousand, nine hundred sixty-one".