518273121 has 4 divisors (see below), whose sum is σ = 691030832. Its totient is φ = 345515412.

The previous prime is 518273113. The next prime is 518273149. The reversal of 518273121 is 121372815.

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.

It is not a de Polignac number, because 518273121 - 2³ = 518273113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518273111) 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, 86378851 + ... + 86378856.

It is an arithmetic number, because the mean of its divisors is an integer number (172757708).

Almost surely, 2^518273121 is an apocalyptic number.

It is an amenable number.

518273121 is a deficient number, since it is larger than the sum of its proper divisors (172757711).

518273121 is a wasteful number, since it uses less digits than its factorization.

518273121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172757710.

The product of its digits is 3360, while the sum is 30.

The square root of 518273121 is about 22765.6126866816. The cubic root of 518273121 is about 803.2539969553.

The spelling of 518273121 in words is "five hundred eighteen million, two hundred seventy-three thousand, one hundred twenty-one".