241521431521 has 2 divisors, whose sum is σ = 241521431522. Its totient is φ = 241521431520.

The previous prime is 241521431507. The next prime is 241521431563. The reversal of 241521431521 is 125134125142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220688550625 + 20832880896 = 469775^2 + 144336^2 .

It is a cyclic number.

It is not a de Polignac number, because 241521431521 - 2¹⁹ = 241520907233 is a prime.

It is not a weakly prime, because it can be changed into another prime (241521431821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120760715760 + 120760715761.

It is an arithmetic number, because the mean of its divisors is an integer number (120760715761).

Almost surely, 2^241521431521 is an apocalyptic number.

It is an amenable number.

241521431521 is a deficient number, since it is larger than the sum of its proper divisors (1).

241521431521 is an equidigital number, since it uses as much as digits as its factorization.

241521431521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

Adding to 241521431521 its reverse (125134125142), we get a palindrome (366655556663).

The spelling of 241521431521 in words is "two hundred forty-one billion, five hundred twenty-one million, four hundred thirty-one thousand, five hundred twenty-one".