521460240097 has 4 divisors (see below), whose sum is σ = 524162106820. Its totient is φ = 518758373376.

The previous prime is 521460240083. The next prime is 521460240113. The reversal of 521460240097 is 790042064125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 376454646481 + 145005593616 = 613559^2 + 380796^2 .

It is a cyclic number.

It is not a de Polignac number, because 521460240097 - 2¹⁹ = 521459715809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521460240397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350933072 + ... + 1350933457.

It is an arithmetic number, because the mean of its divisors is an integer number (131040526705).

Almost surely, 2^521460240097 is an apocalyptic number.

It is an amenable number.

521460240097 is a deficient number, since it is larger than the sum of its proper divisors (2701866723).

521460240097 is a wasteful number, since it uses less digits than its factorization.

521460240097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701866722.

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

The spelling of 521460240097 in words is "five hundred twenty-one billion, four hundred sixty million, two hundred forty thousand, ninety-seven".