520256383 has 4 divisors (see below), whose sum is σ = 520493688. Its totient is φ = 520019080.

The previous prime is 520256357. The next prime is 520256411. The reversal of 520256383 is 383652025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520256383 - 2²¹ = 518159231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520256323) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 115333 + ... + 119758.

It is an arithmetic number, because the mean of its divisors is an integer number (130123422).

Almost surely, 2^520256383 is an apocalyptic number.

520256383 is a deficient number, since it is larger than the sum of its proper divisors (237305).

520256383 is a wasteful number, since it uses less digits than its factorization.

520256383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237304.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 520256383 is about 22809.1293783871. The cubic root of 520256383 is about 804.2772897128.

The spelling of 520256383 in words is "five hundred twenty million, two hundred fifty-six thousand, three hundred eighty-three".