2156246413 has 2 divisors, whose sum is σ = 2156246414. Its totient is φ = 2156246412.

The previous prime is 2156246381. The next prime is 2156246423. The reversal of 2156246413 is 3146426512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1886859844 + 269386569 = 43438^2 + 16413^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156246413 - 2⁵ = 2156246381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156246423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078123206 + 1078123207.

It is an arithmetic number, because the mean of its divisors is an integer number (1078123207).

Almost surely, 2^2156246413 is an apocalyptic number.

It is an amenable number.

2156246413 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156246413 is an equidigital number, since it uses as much as digits as its factorization.

2156246413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 2156246413 is about 46435.4004289831. The cubic root of 2156246413 is about 1291.9115967095.

The spelling of 2156246413 in words is "two billion, one hundred fifty-six million, two hundred forty-six thousand, four hundred thirteen".