531020513537 has 2 divisors, whose sum is σ = 531020513538. Its totient is φ = 531020513536.

The previous prime is 531020513531. The next prime is 531020513557. The reversal of 531020513537 is 735315020135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525058202881 + 5962310656 = 724609^2 + 77216^2 .

It is a cyclic number.

It is not a de Polignac number, because 531020513537 - 2²⁰ = 531019464961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531020513497 and 531020513506.

It is not a weakly prime, because it can be changed into another prime (531020513531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265510256768 + 265510256769.

It is an arithmetic number, because the mean of its divisors is an integer number (265510256769).

Almost surely, 2^531020513537 is an apocalyptic number.

It is an amenable number.

531020513537 is a deficient number, since it is larger than the sum of its proper divisors (1).

531020513537 is an equidigital number, since it uses as much as digits as its factorization.

531020513537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47250, while the sum is 35.

The spelling of 531020513537 in words is "five hundred thirty-one billion, twenty million, five hundred thirteen thousand, five hundred thirty-seven".