2515981511 has 2 divisors, whose sum is σ = 2515981512. Its totient is φ = 2515981510.

The previous prime is 2515981423. The next prime is 2515981519. The reversal of 2515981511 is 1151895152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2515981511 - 2¹⁰ = 2515980487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2515981519) 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, 1257990755 + 1257990756.

It is an arithmetic number, because the mean of its divisors is an integer number (1257990756).

Almost surely, 2^2515981511 is an apocalyptic number.

2515981511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515981511 is an equidigital number, since it uses as much as digits as its factorization.

2515981511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 38.

The square root of 2515981511 is about 50159.5605144224. The cubic root of 2515981511 is about 1360.0947005495.

The spelling of 2515981511 in words is "two billion, five hundred fifteen million, nine hundred eighty-one thousand, five hundred eleven".