520306445 has 4 divisors (see below), whose sum is σ = 624367740. Its totient is φ = 416245152.

The previous prime is 520306411. The next prime is 520306463. The reversal of 520306445 is 544603025.

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 142898116 + 377408329 = 11954^2 + 19427^2 .

It is a cyclic number.

It is not a de Polignac number, because 520306445 - 2¹⁶ = 520240909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52030640 + ... + 52030649.

It is an arithmetic number, because the mean of its divisors is an integer number (156091935).

Almost surely, 2^520306445 is an apocalyptic number.

It is an amenable number.

520306445 is a deficient number, since it is larger than the sum of its proper divisors (104061295).

520306445 is a wasteful number, since it uses less digits than its factorization.

520306445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104061294.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 520306445 is about 22810.2267634498. The cubic root of 520306445 is about 804.3030862493.

The spelling of 520306445 in words is "five hundred twenty million, three hundred six thousand, four hundred forty-five".