247998115 has 4 divisors (see below), whose sum is σ = 297597744. Its totient is φ = 198398488.

The previous prime is 247998103. The next prime is 247998131. The reversal of 247998115 is 511899742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511899742 = 2 ⋅255949871.

It is a cyclic number.

It is not a de Polignac number, because 247998115 - 2⁵ = 247998083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 24799807 + ... + 24799816.

It is an arithmetic number, because the mean of its divisors is an integer number (74399436).

Almost surely, 2^247998115 is an apocalyptic number.

247998115 is a deficient number, since it is larger than the sum of its proper divisors (49599629).

247998115 is an equidigital number, since it uses as much as digits as its factorization.

247998115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49599628.

The product of its digits is 181440, while the sum is 46.

The square root of 247998115 is about 15747.9558991000. The cubic root of 247998115 is about 628.2745386725.

The spelling of 247998115 in words is "two hundred forty-seven million, nine hundred ninety-eight thousand, one hundred fifteen".