520212206531 has 4 divisors (see below), whose sum is σ = 520798692432. Its totient is φ = 519625720632.

The previous prime is 520212206491. The next prime is 520212206533. The reversal of 520212206531 is 135602212025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520212206531 is a prime.

It is a super-2 number, since 2×520212206531² (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 = 520212206494 and 520212206503.

It is not an unprimeable number, because it can be changed into a prime (520212206533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293241620 + ... + 293243393.

It is an arithmetic number, because the mean of its divisors is an integer number (130199673108).

Almost surely, 2^520212206531 is an apocalyptic number.

520212206531 is a deficient number, since it is larger than the sum of its proper divisors (586485901).

520212206531 is an equidigital number, since it uses as much as digits as its factorization.

520212206531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586485900.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 520212206531 its reverse (135602212025), we get a palindrome (655814418556).

The spelling of 520212206531 in words is "five hundred twenty billion, two hundred twelve million, two hundred six thousand, five hundred thirty-one".