2119306261 has 2 divisors, whose sum is σ = 2119306262. Its totient is φ = 2119306260.

The previous prime is 2119306249. The next prime is 2119306271. The reversal of 2119306261 is 1626039112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1990052100 + 129254161 = 44610^2 + 11369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2119306261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2119306271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059653130 + 1059653131.

It is an arithmetic number, because the mean of its divisors is an integer number (1059653131).

Almost surely, 2^2119306261 is an apocalyptic number.

It is an amenable number.

2119306261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119306261 is an equidigital number, since it uses as much as digits as its factorization.

2119306261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2119306261 is about 46035.9235923425. The cubic root of 2119306261 is about 1284.4915167832.

The spelling of 2119306261 in words is "two billion, one hundred nineteen million, three hundred six thousand, two hundred sixty-one".