511323123213 has 48 divisors (see below), whose sum is σ = 888658542720. Its totient is φ = 276761691648.

The previous prime is 511323123191. The next prime is 511323123257. The reversal of 511323123213 is 312321323115.

511323123213 is a `hidden beast` number, since 5 + 1 + 1 + 323 + 12 + 321 + 3 = 666.

It is not a de Polignac number, because 511323123213 - 2⁹ = 511323122701 is a prime.

It is a super-2 number, since 2×511323123213² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511323133213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8176681 + ... + 8238977.

It is an arithmetic number, because the mean of its divisors is an integer number (18513719640).

Almost surely, 2^511323123213 is an apocalyptic number.

It is an amenable number.

511323123213 is a deficient number, since it is larger than the sum of its proper divisors (377335419507).

511323123213 is a wasteful number, since it uses less digits than its factorization.

511323123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69186 (or 69183 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

Adding to 511323123213 its reverse (312321323115), we get a palindrome (823644446328).

The spelling of 511323123213 in words is "five hundred eleven billion, three hundred twenty-three million, one hundred twenty-three thousand, two hundred thirteen".