2015120287 has 2 divisors, whose sum is σ = 2015120288. Its totient is φ = 2015120286.

The previous prime is 2015120281. The next prime is 2015120329. The reversal of 2015120287 is 7820215102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2015120287 - 2²³ = 2006731679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015120281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007560143 + 1007560144.

It is an arithmetic number, because the mean of its divisors is an integer number (1007560144).

Almost surely, 2^2015120287 is an apocalyptic number.

2015120287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015120287 is an equidigital number, since it uses as much as digits as its factorization.

2015120287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 2015120287 is about 44890.0911894819. The cubic root of 2015120287 is about 1263.0881433381.

Adding to 2015120287 its reverse (7820215102), we get a palindrome (9835335389).

The spelling of 2015120287 in words is "two billion, fifteen million, one hundred twenty thousand, two hundred eighty-seven".