511223664131 has 16 divisors (see below), whose sum is σ = 546516669600. Its totient is φ = 476514897408.

The previous prime is 511223664031. The next prime is 511223664143. The reversal of 511223664131 is 131466322115.

It is a cyclic number.

It is not a de Polignac number, because 511223664131 - 2³⁰ = 510149922307 is a prime.

It is a super-2 number, since 2×511223664131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 511223664091 and 511223664100.

It is not an unprimeable number, because it can be changed into a prime (511223664191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3974381 + ... + 4100993.

It is an arithmetic number, because the mean of its divisors is an integer number (34157291850).

Almost surely, 2^511223664131 is an apocalyptic number.

511223664131 is a deficient number, since it is larger than the sum of its proper divisors (35293005469).

511223664131 is a wasteful number, since it uses less digits than its factorization.

511223664131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128918.

The product of its digits is 25920, while the sum is 35.

Adding to 511223664131 its reverse (131466322115), we get a palindrome (642689986246).

The spelling of 511223664131 in words is "five hundred eleven billion, two hundred twenty-three million, six hundred sixty-four thousand, one hundred thirty-one".