511212340117 has 4 divisors (see below), whose sum is σ = 511757925196. Its totient is φ = 510666755040.

The previous prime is 511212340099. The next prime is 511212340123. The reversal of 511212340117 is 711043212115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98038498321 + 413173841796 = 313111^2 + 642786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511212340117 is a prime.

It is a super-2 number, since 2×511212340117² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511212347117) 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, 272791134 + ... + 272793007.

It is an arithmetic number, because the mean of its divisors is an integer number (127939481299).

Almost surely, 2^511212340117 is an apocalyptic number.

It is an amenable number.

511212340117 is a deficient number, since it is larger than the sum of its proper divisors (545585079).

511212340117 is an equidigital number, since it uses as much as digits as its factorization.

511212340117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545585078.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 511212340117 in words is "five hundred eleven billion, two hundred twelve million, three hundred forty thousand, one hundred seventeen".