2155308457 has 2 divisors, whose sum is σ = 2155308458. Its totient is φ = 2155308456.

The previous prime is 2155308439. The next prime is 2155308487. The reversal of 2155308457 is 7548035512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1446737296 + 708571161 = 38036^2 + 26619^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155308457 - 2¹⁹ = 2154784169 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155308487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077654228 + 1077654229.

It is an arithmetic number, because the mean of its divisors is an integer number (1077654229).

Almost surely, 2^2155308457 is an apocalyptic number.

It is an amenable number.

2155308457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155308457 is an equidigital number, since it uses as much as digits as its factorization.

2155308457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 2155308457 is about 46425.2997513209. The cubic root of 2155308457 is about 1291.7242445944.

The spelling of 2155308457 in words is "two billion, one hundred fifty-five million, three hundred eight thousand, four hundred fifty-seven".