521364361 has 6 divisors (see below), whose sum is σ = 606485130. Its totient is φ = 446883696.

The previous prime is 521364359. The next prime is 521364367. The reversal of 521364361 is 163463125.

It can be written as a sum of positive squares in only one way, i.e., 361190025 + 160174336 = 19005^2 + 12656^2 .

It is not a de Polignac number, because 521364361 - 2¹ = 521364359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521364367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5319996 + ... + 5320093.

It is an arithmetic number, because the mean of its divisors is an integer number (101080855).

Almost surely, 2^521364361 is an apocalyptic number.

It is an amenable number.

521364361 is a deficient number, since it is larger than the sum of its proper divisors (85120769).

521364361 is a wasteful number, since it uses less digits than its factorization.

521364361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10640103 (or 10640096 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 521364361 is about 22833.4044986726. The cubic root of 521364361 is about 804.8478351330.

The spelling of 521364361 in words is "five hundred twenty-one million, three hundred sixty-four thousand, three hundred sixty-one".