521463131131 has 4 divisors (see below), whose sum is σ = 521484582232. Its totient is φ = 521441680032.

The previous prime is 521463131089. The next prime is 521463131179. The reversal of 521463131131 is 131131364125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521463131131 - 2¹⁹ = 521462606843 is a prime.

It is a super-2 number, since 2×521463131131² (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 = 521463131093 and 521463131102.

It is not an unprimeable number, because it can be changed into a prime (521463131831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10689045 + ... + 10737718.

It is an arithmetic number, because the mean of its divisors is an integer number (130371145558).

Almost surely, 2^521463131131 is an apocalyptic number.

521463131131 is a deficient number, since it is larger than the sum of its proper divisors (21451101).

521463131131 is a wasteful number, since it uses less digits than its factorization.

521463131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21451100.

The product of its digits is 6480, while the sum is 31.

Adding to 521463131131 its reverse (131131364125), we get a palindrome (652594495256).

The spelling of 521463131131 in words is "five hundred twenty-one billion, four hundred sixty-three million, one hundred thirty-one thousand, one hundred thirty-one".