520133421 has 8 divisors (see below), whose sum is σ = 710426304. Its totient is φ = 338298080.

The previous prime is 520133401. The next prime is 520133423. The reversal of 520133421 is 124331025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520133421 - 2¹⁰ = 520132397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520133423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114241 + ... + 2114486.

It is an arithmetic number, because the mean of its divisors is an integer number (88803288).

Almost surely, 2^520133421 is an apocalyptic number.

It is an amenable number.

520133421 is a deficient number, since it is larger than the sum of its proper divisors (190292883).

520133421 is a wasteful number, since it uses less digits than its factorization.

520133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228771.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 520133421 is about 22806.4337633046. The cubic root of 520133421 is about 804.2139213816.

Adding to 520133421 its reverse (124331025), we get a palindrome (644464446).

The spelling of 520133421 in words is "five hundred twenty million, one hundred thirty-three thousand, four hundred twenty-one".