2015521093 has 2 divisors, whose sum is σ = 2015521094. Its totient is φ = 2015521092.

The previous prime is 2015521049. The next prime is 2015521111. The reversal of 2015521093 is 3901255102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1616200804 + 399320289 = 40202^2 + 19983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2015521093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015521493) 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, 1007760546 + 1007760547.

It is an arithmetic number, because the mean of its divisors is an integer number (1007760547).

Almost surely, 2^2015521093 is an apocalyptic number.

It is an amenable number.

2015521093 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015521093 is an equidigital number, since it uses as much as digits as its factorization.

2015521093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2015521093 is about 44894.5552712130. Note that the first 3 decimals coincide. The cubic root of 2015521093 is about 1263.1718802328.

Adding to 2015521093 its reverse (3901255102), we get a palindrome (5916776195).

The spelling of 2015521093 in words is "two billion, fifteen million, five hundred twenty-one thousand, ninety-three".