520156531117 has 2 divisors, whose sum is σ = 520156531118. Its totient is φ = 520156531116.

The previous prime is 520156531061. The next prime is 520156531121. The reversal of 520156531117 is 711135651025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461599306921 + 58557224196 = 679411^2 + 241986^2 .

It is a cyclic number.

It is not a de Polignac number, because 520156531117 - 2²⁷ = 520022313389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520156531157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260078265558 + 260078265559.

It is an arithmetic number, because the mean of its divisors is an integer number (260078265559).

Almost surely, 2^520156531117 is an apocalyptic number.

It is an amenable number.

520156531117 is a deficient number, since it is larger than the sum of its proper divisors (1).

520156531117 is an equidigital number, since it uses as much as digits as its factorization.

520156531117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31500, while the sum is 37.

The spelling of 520156531117 in words is "five hundred twenty billion, one hundred fifty-six million, five hundred thirty-one thousand, one hundred seventeen".