2513201081 has 2 divisors, whose sum is σ = 2513201082. Its totient is φ = 2513201080.

The previous prime is 2513201077. The next prime is 2513201101. The reversal of 2513201081 is 1801023152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1883994025 + 629207056 = 43405^2 + 25084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513201081 - 2² = 2513201077 is a prime.

It is a super-2 number, since 2×2513201081² = 12632359347079137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2513201051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256600540 + 1256600541.

It is an arithmetic number, because the mean of its divisors is an integer number (1256600541).

Almost surely, 2^2513201081 is an apocalyptic number.

It is an amenable number.

2513201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2513201081 is an equidigital number, since it uses as much as digits as its factorization.

2513201081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2513201081 is about 50131.8370000542. The cubic root of 2513201081 is about 1359.5934989322.

The spelling of 2513201081 in words is "two billion, five hundred thirteen million, two hundred one thousand, eighty-one".