521142536231 has 2 divisors, whose sum is σ = 521142536232. Its totient is φ = 521142536230.

The previous prime is 521142536227. The next prime is 521142536261. The reversal of 521142536231 is 132635241125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521142536231 - 2² = 521142536227 is a prime.

It is a super-2 number, since 2×521142536231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521142536191 and 521142536200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521142536261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260571268115 + 260571268116.

It is an arithmetic number, because the mean of its divisors is an integer number (260571268116).

Almost surely, 2^521142536231 is an apocalyptic number.

521142536231 is a deficient number, since it is larger than the sum of its proper divisors (1).

521142536231 is an equidigital number, since it uses as much as digits as its factorization.

521142536231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

Adding to 521142536231 its reverse (132635241125), we get a palindrome (653777777356).

The spelling of 521142536231 in words is "five hundred twenty-one billion, one hundred forty-two million, five hundred thirty-six thousand, two hundred thirty-one".