531240191763871 has 2 divisors, whose sum is σ = 531240191763872. Its totient is φ = 531240191763870.

The previous prime is 531240191763823. The next prime is 531240191763923. The reversal of 531240191763871 is 178367191042135.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531240191763871 is a prime.

It is a super-2 number, since 2×531240191763871² (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 (531240191763811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265620095881935 + 265620095881936.

It is an arithmetic number, because the mean of its divisors is an integer number (265620095881936).

It is a 1-persistent number, because it is pandigital, but 2⋅531240191763871 = 1062480383527742 is not.

Almost surely, 2^{531240191763871} is an apocalyptic number.

531240191763871 is a deficient number, since it is larger than the sum of its proper divisors (1).

531240191763871 is an equidigital number, since it uses as much as digits as its factorization.

531240191763871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 58.

The spelling of 531240191763871 in words is "five hundred thirty-one trillion, two hundred forty billion, one hundred ninety-one million, seven hundred sixty-three thousand, eight hundred seventy-one".