520145433 has 12 divisors (see below), whose sum is σ = 755666340. Its totient is φ = 344758176.

The previous prime is 520145429. The next prime is 520145443. The reversal of 520145433 is 334541025.

520145433 is a `hidden beast` number, since 5 + 201 + 454 + 3 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 445547664 + 74597769 = 21108^2 + 8637^2 .

It is not a de Polignac number, because 520145433 - 2² = 520145429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520145397 and 520145406.

It is not an unprimeable number, because it can be changed into a prime (520145443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165478 + ... + 168591.

It is an arithmetic number, because the mean of its divisors is an integer number (62972195).

Almost surely, 2^520145433 is an apocalyptic number.

It is an amenable number.

520145433 is a deficient number, since it is larger than the sum of its proper divisors (235520907).

520145433 is a wasteful number, since it uses less digits than its factorization.

520145433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334248 (or 334245 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 520145433 is about 22806.6971085249. The cubic root of 520145433 is about 804.2201121927.

Adding to 520145433 its reverse (334541025), we get a palindrome (854686458).

The spelling of 520145433 in words is "five hundred twenty million, one hundred forty-five thousand, four hundred thirty-three".