531200520113 has 2 divisors, whose sum is σ = 531200520114. Its totient is φ = 531200520112.

The previous prime is 531200520107. The next prime is 531200520131. The reversal of 531200520113 is 311025002135.

It is a happy number.

Together with next prime (531200520131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516253746064 + 14946774049 = 718508^2 + 122257^2 .

It is a cyclic number.

It is not a de Polignac number, because 531200520113 - 2¹⁸ = 531200257969 is a prime.

It is not a weakly prime, because it can be changed into another prime (531200520163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265600260056 + 265600260057.

It is an arithmetic number, because the mean of its divisors is an integer number (265600260057).

Almost surely, 2^531200520113 is an apocalyptic number.

It is an amenable number.

531200520113 is a deficient number, since it is larger than the sum of its proper divisors (1).

531200520113 is an equidigital number, since it uses as much as digits as its factorization.

531200520113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 531200520113 its reverse (311025002135), we get a palindrome (842225522248).

The spelling of 531200520113 in words is "five hundred thirty-one billion, two hundred million, five hundred twenty thousand, one hundred thirteen".