521050045 has 8 divisors (see below), whose sum is σ = 629824824. Its totient is φ = 413796864.

The previous prime is 521050039. The next prime is 521050067. The reversal of 521050045 is 540050125.

It can be written as a sum of positive squares in 4 ways, for example, as 176650681 + 344399364 = 13291^2 + 18558^2 .

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 521050045 - 2²¹ = 518952893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521049998 and 521050025.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379644 + ... + 381013.

It is an arithmetic number, because the mean of its divisors is an integer number (78728103).

Almost surely, 2^521050045 is an apocalyptic number.

It is an amenable number.

521050045 is a deficient number, since it is larger than the sum of its proper divisors (108774779).

521050045 is a wasteful number, since it uses less digits than its factorization.

521050045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760799.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 521050045 is about 22826.5206503313. The cubic root of 521050045 is about 804.6860625318.

It can be divided in two parts, 5210 and 50045, that added together give a palindrome (55255).

The spelling of 521050045 in words is "five hundred twenty-one million, fifty thousand, forty-five".