518350081 has 4 divisors (see below), whose sum is σ = 518828032. Its totient is φ = 517872132.

The previous prime is 518350073. The next prime is 518350087. The reversal of 518350081 is 180053815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180053815 = 5 ⋅36010763.

It is a cyclic number.

It is not a de Polignac number, because 518350081 - 2³ = 518350073 is a prime.

It is a super-2 number, since 2×518350081² = 537373612945413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518350087) 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, 237345 + ... + 239518.

It is an arithmetic number, because the mean of its divisors is an integer number (129707008).

Almost surely, 2^518350081 is an apocalyptic number.

It is an amenable number.

518350081 is a deficient number, since it is larger than the sum of its proper divisors (477951).

518350081 is a wasteful number, since it uses less digits than its factorization.

518350081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477950.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 518350081 is about 22767.3028925255. The cubic root of 518350081 is about 803.2937542220.

The spelling of 518350081 in words is "five hundred eighteen million, three hundred fifty thousand, eighty-one".