2515090861 has 2 divisors, whose sum is σ = 2515090862. Its totient is φ = 2515090860.

The previous prime is 2515090849. The next prime is 2515090867. The reversal of 2515090861 is 1680905152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1686744900 + 828345961 = 41070^2 + 28781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515090861 - 2¹⁵ = 2515058093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2515090861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2515090867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257545430 + 1257545431.

It is an arithmetic number, because the mean of its divisors is an integer number (1257545431).

Almost surely, 2^2515090861 is an apocalyptic number.

It is an amenable number.

2515090861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515090861 is an equidigital number, since it uses as much as digits as its factorization.

2515090861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 2515090861 is about 50150.6815606727. The cubic root of 2515090861 is about 1359.9341917768.

The spelling of 2515090861 in words is "two billion, five hundred fifteen million, ninety thousand, eight hundred sixty-one".