520155473 has 4 divisors (see below), whose sum is σ = 521796660. Its totient is φ = 518514288.

The previous prime is 520155469. The next prime is 520155481. The reversal of 520155473 is 374551025.

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 88887184 + 431268289 = 9428^2 + 20767^2 .

It is a cyclic number.

It is not a de Polignac number, because 520155473 - 2² = 520155469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520155463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820118 + ... + 820751.

It is an arithmetic number, because the mean of its divisors is an integer number (130449165).

Almost surely, 2^520155473 is an apocalyptic number.

It is an amenable number.

520155473 is a deficient number, since it is larger than the sum of its proper divisors (1641187).

520155473 is a wasteful number, since it uses less digits than its factorization.

520155473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641186.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 520155473 is about 22806.9172182476. The cubic root of 520155473 is about 804.2252865904.

The spelling of 520155473 in words is "five hundred twenty million, one hundred fifty-five thousand, four hundred seventy-three".