531951271993 has 2 divisors, whose sum is σ = 531951271994. Its totient is φ = 531951271992.

The previous prime is 531951271967. The next prime is 531951271997. The reversal of 531951271993 is 399172159135.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513912633129 + 18038638864 = 716877^2 + 134308^2 .

It is a cyclic number.

It is not a de Polignac number, because 531951271993 - 2¹³ = 531951263801 is a prime.

It is not a weakly prime, because it can be changed into another prime (531951271997) 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 as a sum of consecutive naturals, namely, 265975635996 + 265975635997.

It is an arithmetic number, because the mean of its divisors is an integer number (265975635997).

Almost surely, 2^531951271993 is an apocalyptic number.

It is an amenable number.

531951271993 is a deficient number, since it is larger than the sum of its proper divisors (1).

531951271993 is an equidigital number, since it uses as much as digits as its factorization.

531951271993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2296350, while the sum is 55.

The spelling of 531951271993 in words is "five hundred thirty-one billion, nine hundred fifty-one million, two hundred seventy-one thousand, nine hundred ninety-three".