511155552131 has 16 divisors (see below), whose sum is σ = 587511767040. Its totient is φ = 435639448800.

The previous prime is 511155552107. The next prime is 511155552139. The reversal of 511155552131 is 131255551115.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511155552131 is a prime.

It is a super-2 number, since 2×511155552131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 511155552091 and 511155552100.

It is not an unprimeable number, because it can be changed into a prime (511155552139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653606 + ... + 1203956.

It is an arithmetic number, because the mean of its divisors is an integer number (36719485440).

Almost surely, 2^511155552131 is an apocalyptic number.

511155552131 is a deficient number, since it is larger than the sum of its proper divisors (76356214909).

511155552131 is a wasteful number, since it uses less digits than its factorization.

511155552131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551114.

The product of its digits is 18750, while the sum is 35.

The spelling of 511155552131 in words is "five hundred eleven billion, one hundred fifty-five million, five hundred fifty-two thousand, one hundred thirty-one".