520136346165031 has 2 divisors, whose sum is σ = 520136346165032. Its totient is φ = 520136346165030.

The previous prime is 520136346165019. The next prime is 520136346165067. The reversal of 520136346165031 is 130561643631025.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520136346165031 is a prime.

It is a super-2 number, since 2×520136346165031² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520136346165431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260068173082515 + 260068173082516.

It is an arithmetic number, because the mean of its divisors is an integer number (260068173082516).

Almost surely, 2^{520136346165031} is an apocalyptic number.

520136346165031 is a deficient number, since it is larger than the sum of its proper divisors (1).

520136346165031 is an equidigital number, since it uses as much as digits as its factorization.

520136346165031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 46.

Adding to 520136346165031 its reverse (130561643631025), we get a palindrome (650697989796056).

The spelling of 520136346165031 in words is "five hundred twenty trillion, one hundred thirty-six billion, three hundred forty-six million, one hundred sixty-five thousand, thirty-one".