520425337 has 4 divisors (see below), whose sum is σ = 521424756. Its totient is φ = 519425920.

The previous prime is 520425331. The next prime is 520425349. The reversal of 520425337 is 733524025.

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 47623801 + 472801536 = 6901^2 + 21744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520425337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520425299 and 520425308.

It is not an unprimeable number, because it can be changed into a prime (520425331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498928 + ... + 499969.

It is an arithmetic number, because the mean of its divisors is an integer number (130356189).

Almost surely, 2^520425337 is an apocalyptic number.

It is an amenable number.

520425337 is a deficient number, since it is larger than the sum of its proper divisors (999419).

520425337 is an equidigital number, since it uses as much as digits as its factorization.

520425337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999418.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 520425337 is about 22812.8327263407. The cubic root of 520425337 is about 804.3643436876.

The spelling of 520425337 in words is "five hundred twenty million, four hundred twenty-five thousand, three hundred thirty-seven".