531323523091 has 2 divisors, whose sum is σ = 531323523092. Its totient is φ = 531323523090.

The previous prime is 531323522999. The next prime is 531323523119. The reversal of 531323523091 is 190325323135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531323523091 - 2⁷ = 531323522963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531323523091.

It is not a weakly prime, because it can be changed into another prime (531323523191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265661761545 + 265661761546.

It is an arithmetic number, because the mean of its divisors is an integer number (265661761546).

Almost surely, 2^531323523091 is an apocalyptic number.

531323523091 is a deficient number, since it is larger than the sum of its proper divisors (1).

531323523091 is an equidigital number, since it uses as much as digits as its factorization.

531323523091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 37.

The spelling of 531323523091 in words is "five hundred thirty-one billion, three hundred twenty-three million, five hundred twenty-three thousand, ninety-one".