531046783021 has 2 divisors, whose sum is σ = 531046783022. Its totient is φ = 531046783020.

The previous prime is 531046782907. The next prime is 531046783039. The reversal of 531046783021 is 120387640135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425477025796 + 105569757225 = 652286^2 + 324915^2 .

It is a cyclic number.

It is not a de Polignac number, because 531046783021 - 2¹¹ = 531046780973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531046783051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265523391510 + 265523391511.

It is an arithmetic number, because the mean of its divisors is an integer number (265523391511).

Almost surely, 2^531046783021 is an apocalyptic number.

It is an amenable number.

531046783021 is a deficient number, since it is larger than the sum of its proper divisors (1).

531046783021 is an equidigital number, since it uses as much as digits as its factorization.

531046783021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 531046783021 in words is "five hundred thirty-one billion, forty-six million, seven hundred eighty-three thousand, twenty-one".