521348641 has 16 divisors (see below), whose sum is σ = 590692608. Its totient is φ = 455994000.

The previous prime is 521348629. The next prime is 521348677. The reversal of 521348641 is 146843125.

It is a de Polignac number, because none of the positive numbers 2^k-521348641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521348597 and 521348606.

It is not an unprimeable number, because it can be changed into a prime (521348621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23466 + ... + 39916.

It is an arithmetic number, because the mean of its divisors is an integer number (36918288).

Almost surely, 2^521348641 is an apocalyptic number.

It is an amenable number.

521348641 is a deficient number, since it is larger than the sum of its proper divisors (69343967).

521348641 is a wasteful number, since it uses less digits than its factorization.

521348641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16572.

The product of its digits is 23040, while the sum is 34.

The square root of 521348641 is about 22833.0602635740. The cubic root of 521348641 is about 804.8397458861.

The spelling of 521348641 in words is "five hundred twenty-one million, three hundred forty-eight thousand, six hundred forty-one".