518742242 has 4 divisors (see below), whose sum is σ = 778113366. Its totient is φ = 259371120.

The previous prime is 518742241. The next prime is 518742277. The reversal of 518742242 is 242247815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 476505241 + 42237001 = 21829^2 + 6499^2 .

It is not an unprimeable number, because it can be changed into a prime (518742241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129685559 + ... + 129685562.

Almost surely, 2^518742242 is an apocalyptic number.

518742242 is a deficient number, since it is larger than the sum of its proper divisors (259371124).

518742242 is a wasteful number, since it uses less digits than its factorization.

518742242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259371123.

The product of its digits is 35840, while the sum is 35.

The square root of 518742242 is about 22775.9136369982. The cubic root of 518742242 is about 803.4962821294.

The spelling of 518742242 in words is "five hundred eighteen million, seven hundred forty-two thousand, two hundred forty-two".