413631521 has 4 divisors (see below), whose sum is σ = 414673812. Its totient is φ = 412589232.

The previous prime is 413631509. The next prime is 413631541. The reversal of 413631521 is 125136314.

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 157151296 + 256480225 = 12536^2 + 16015^2 .

It is a cyclic number.

It is not a de Polignac number, because 413631521 - 2⁶ = 413631457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (413631541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520550 + ... + 521343.

It is an arithmetic number, because the mean of its divisors is an integer number (103668453).

Almost surely, 2^413631521 is an apocalyptic number.

It is an amenable number.

413631521 is a deficient number, since it is larger than the sum of its proper divisors (1042291).

413631521 is a wasteful number, since it uses less digits than its factorization.

413631521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042290.

The product of its digits is 2160, while the sum is 26.

The square root of 413631521 is about 20337.9330562375. The cubic root of 413631521 is about 745.0828074855.

Adding to 413631521 its reverse (125136314), we get a palindrome (538767835).

The spelling of 413631521 in words is "four hundred thirteen million, six hundred thirty-one thousand, five hundred twenty-one".