2015521049 has 2 divisors, whose sum is σ = 2015521050. Its totient is φ = 2015521048.

The previous prime is 2015521019. The next prime is 2015521093. The reversal of 2015521049 is 9401255102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1688634649 + 326886400 = 41093^2 + 18080^2 .

It is a cyclic number.

It is not a de Polignac number, because 2015521049 - 2¹² = 2015516953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2015521019) 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, 1007760524 + 1007760525.

It is an arithmetic number, because the mean of its divisors is an integer number (1007760525).

Almost surely, 2^2015521049 is an apocalyptic number.

It is an amenable number.

2015521049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015521049 is an equidigital number, since it uses as much as digits as its factorization.

2015521049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2015521049 is about 44894.5547811759. The cubic root of 2015521049 is about 1263.1718710409.

The spelling of 2015521049 in words is "two billion, fifteen million, five hundred twenty-one thousand, forty-nine".