531661241029 has 2 divisors, whose sum is σ = 531661241030. Its totient is φ = 531661241028.

The previous prime is 531661241017. The next prime is 531661241119. The reversal of 531661241029 is 920142166135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419901408004 + 111759833025 = 647998^2 + 334305^2 .

It is a cyclic number.

It is not a de Polignac number, because 531661241029 - 2¹¹ = 531661238981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531661240982 and 531661241000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531662241029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265830620514 + 265830620515.

It is an arithmetic number, because the mean of its divisors is an integer number (265830620515).

Almost surely, 2^531661241029 is an apocalyptic number.

It is an amenable number.

531661241029 is a deficient number, since it is larger than the sum of its proper divisors (1).

531661241029 is an equidigital number, since it uses as much as digits as its factorization.

531661241029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 531661241029 in words is "five hundred thirty-one billion, six hundred sixty-one million, two hundred forty-one thousand, twenty-nine".