521131111005 has 32 divisors (see below), whose sum is σ = 855866995200. Its totient is φ = 270672241472.

The previous prime is 521131110979. The next prime is 521131111037. The reversal of 521131111005 is 500111131125.

It is a cyclic number.

It is not a de Polignac number, because 521131111005 - 2⁸ = 521131110749 is a prime.

It is a super-2 number, since 2×521131111005² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2656935 + ... + 2846324.

It is an arithmetic number, because the mean of its divisors is an integer number (26745843600).

Almost surely, 2^521131111005 is an apocalyptic number.

It is an amenable number.

521131111005 is a deficient number, since it is larger than the sum of its proper divisors (334735884195).

521131111005 is a wasteful number, since it uses less digits than its factorization.

521131111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503433.

The product of its (nonzero) digits is 150, while the sum is 21.

The spelling of 521131111005 in words is "five hundred twenty-one billion, one hundred thirty-one million, one hundred eleven thousand, five".