518142227 has 4 divisors (see below), whose sum is σ = 518524296. Its totient is φ = 517760160.

The previous prime is 518142199. The next prime is 518142253. The reversal of 518142227 is 722241815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722241815 = 5 ⋅144448363.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518142227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518142193 and 518142202.

It is not an unprimeable number, because it can be changed into a prime (518142127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188993 + ... + 191714.

It is an arithmetic number, because the mean of its divisors is an integer number (129631074).

Almost surely, 2^518142227 is an apocalyptic number.

518142227 is a deficient number, since it is larger than the sum of its proper divisors (382069).

518142227 is a wasteful number, since it uses less digits than its factorization.

518142227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382068.

The product of its digits is 8960, while the sum is 32.

The square root of 518142227 is about 22762.7376868425. The cubic root of 518142227 is about 803.1863685325.

The spelling of 518142227 in words is "five hundred eighteen million, one hundred forty-two thousand, two hundred twenty-seven".