531321154493 has 2 divisors, whose sum is σ = 531321154494. Its totient is φ = 531321154492.

The previous prime is 531321154477. The next prime is 531321154541. The reversal of 531321154493 is 394451123135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498037895524 + 33283258969 = 705718^2 + 182437^2 .

It is a cyclic number.

It is not a de Polignac number, because 531321154493 - 2⁴ = 531321154477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531321154493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531321154993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265660577246 + 265660577247.

It is an arithmetic number, because the mean of its divisors is an integer number (265660577247).

Almost surely, 2^531321154493 is an apocalyptic number.

It is an amenable number.

531321154493 is a deficient number, since it is larger than the sum of its proper divisors (1).

531321154493 is an equidigital number, since it uses as much as digits as its factorization.

531321154493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 41.

The spelling of 531321154493 in words is "five hundred thirty-one billion, three hundred twenty-one million, one hundred fifty-four thousand, four hundred ninety-three".