520646233 has 4 divisors (see below), whose sum is σ = 551272500. Its totient is φ = 490019968.

The previous prime is 520646197. The next prime is 520646237. The reversal of 520646233 is 332646025.

It is a happy number.

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 431475984 + 89170249 = 20772^2 + 9443^2 .

It is not a de Polignac number, because 520646233 - 2²¹ = 518549081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520646195 and 520646204.

It is not an unprimeable number, because it can be changed into a prime (520646237) 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, 15313108 + ... + 15313141.

It is an arithmetic number, because the mean of its divisors is an integer number (137818125).

Almost surely, 2^520646233 is an apocalyptic number.

It is an amenable number.

520646233 is a deficient number, since it is larger than the sum of its proper divisors (30626267).

520646233 is a wasteful number, since it uses less digits than its factorization.

520646233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30626266.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 520646233 is about 22817.6736982542. The cubic root of 520646233 is about 804.4781324935.

The spelling of 520646233 in words is "five hundred twenty million, six hundred forty-six thousand, two hundred thirty-three".