521359045 has 8 divisors (see below), whose sum is σ = 642540024. Its totient is φ = 405814464.

The previous prime is 521358991. The next prime is 521359049. The reversal of 521359045 is 540953125.

It can be written as a sum of positive squares in 4 ways, for example, as 101969604 + 419389441 = 10098^2 + 20479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521359045 - 2²¹ = 519261893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521359045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521359049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408894 + ... + 1409263.

It is an arithmetic number, because the mean of its divisors is an integer number (80317503).

Almost surely, 2^521359045 is an apocalyptic number.

It is an amenable number.

521359045 is a deficient number, since it is larger than the sum of its proper divisors (121180979).

521359045 is a wasteful number, since it uses less digits than its factorization.

521359045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818199.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 521359045 is about 22833.2880899795. The cubic root of 521359045 is about 804.8450996273.

The spelling of 521359045 in words is "five hundred twenty-one million, three hundred fifty-nine thousand, forty-five".