520534504531 has 4 divisors (see below), whose sum is σ = 522807581200. Its totient is φ = 518261427864.

The previous prime is 520534504489. The next prime is 520534504559. The reversal of 520534504531 is 135405435025.

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 520534504531 - 2²⁷ = 520400286803 is a prime.

It is a super-2 number, since 2×520534504531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520534504571) 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, 1136537991 + ... + 1136538448.

It is an arithmetic number, because the mean of its divisors is an integer number (130701895300).

Almost surely, 2^520534504531 is an apocalyptic number.

520534504531 is a deficient number, since it is larger than the sum of its proper divisors (2273076669).

520534504531 is a wasteful number, since it uses less digits than its factorization.

520534504531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273076668.

The product of its (nonzero) digits is 180000, while the sum is 37.

Adding to 520534504531 its reverse (135405435025), we get a palindrome (655939939556).

The spelling of 520534504531 in words is "five hundred twenty billion, five hundred thirty-four million, five hundred four thousand, five hundred thirty-one".