521133132231 has 12 divisors (see below), whose sum is σ = 777030047040. Its totient is φ = 336214923840.

The previous prime is 521133132211. The next prime is 521133132257. The reversal of 521133132231 is 132231331125.

521133132231 is a `hidden beast` number, since 5 + 2 + 1 + 1 + 331 + 322 + 3 + 1 = 666.

It is not a de Polignac number, because 521133132231 - 2⁵ = 521133132199 is a prime.

It is a super-2 number, since 2×521133132231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521133132195 and 521133132204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521133132211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933930066 + ... + 933930623.

It is an arithmetic number, because the mean of its divisors is an integer number (64752503920).

Almost surely, 2^521133132231 is an apocalyptic number.

521133132231 is a deficient number, since it is larger than the sum of its proper divisors (255896914809).

521133132231 is a wasteful number, since it uses less digits than its factorization.

521133132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867860726 (or 1867860723 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

Adding to 521133132231 its reverse (132231331125), we get a palindrome (653364463356).

The spelling of 521133132231 in words is "five hundred twenty-one billion, one hundred thirty-three million, one hundred thirty-two thousand, two hundred thirty-one".