518991242 has 32 divisors (see below), whose sum is σ = 990403200. Its totient is φ = 202201440.

The previous prime is 518991241. The next prime is 518991271. The reversal of 518991242 is 242199815.

It is a self number, because there is not a number n which added to its sum of digits gives 518991242.

It is not an unprimeable number, because it can be changed into a prime (518991241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26843 + ... + 41934.

It is an arithmetic number, because the mean of its divisors is an integer number (30950100).

Almost surely, 2^518991242 is an apocalyptic number.

518991242 is a deficient number, since it is larger than the sum of its proper divisors (471411958).

518991242 is a wasteful number, since it uses less digits than its factorization.

518991242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68811 (or 68797 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 518991242 is about 22781.3792822120. The cubic root of 518991242 is about 803.6248228926.

The spelling of 518991242 in words is "five hundred eighteen million, nine hundred ninety-one thousand, two hundred forty-two".