515115091 has 2 divisors, whose sum is σ = 515115092. Its totient is φ = 515115090.

The previous prime is 515115089. The next prime is 515115101. The reversal of 515115091 is 190511515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515115091 - 2¹ = 515115089 is a prime.

Together with 515115089, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (515115031) 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, 257557545 + 257557546.

It is an arithmetic number, because the mean of its divisors is an integer number (257557546).

Almost surely, 2^515115091 is an apocalyptic number.

515115091 is a deficient number, since it is larger than the sum of its proper divisors (1).

515115091 is an equidigital number, since it uses as much as digits as its factorization.

515115091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 28.

The square root of 515115091 is about 22696.1470518676. The cubic root of 515115091 is about 801.6191639036.

The spelling of 515115091 in words is "five hundred fifteen million, one hundred fifteen thousand, ninety-one".