521311068231 has 16 divisors (see below), whose sum is σ = 696676982400. Its totient is φ = 346743635168.

The previous prime is 521311068197. The next prime is 521311068233. The reversal of 521311068231 is 132860113125.

It is a cyclic number.

It is not a de Polignac number, because 521311068231 - 2¹¹ = 521311066183 is a prime.

It is a super-2 number, since 2×521311068231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521311068192 and 521311068201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521311068233) 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, 2922940 + ... + 3096158.

It is an arithmetic number, because the mean of its divisors is an integer number (43542311400).

Almost surely, 2^521311068231 is an apocalyptic number.

521311068231 is a deficient number, since it is larger than the sum of its proper divisors (175365914169).

521311068231 is a wasteful number, since it uses less digits than its factorization.

521311068231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175518.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 521311068231 in words is "five hundred twenty-one billion, three hundred eleven million, sixty-eight thousand, two hundred thirty-one".