520420043413 has 4 divisors (see below), whose sum is σ = 520973094348. Its totient is φ = 519866992480.

The previous prime is 520420043389. The next prime is 520420043467. The reversal of 520420043413 is 314340024025.

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 194249984644 + 326170058769 = 440738^2 + 571113^2 .

It is a cyclic number.

It is not a de Polignac number, because 520420043413 - 2²¹ = 520417946261 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 (520420043113) 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, 276524056 + ... + 276525937.

It is an arithmetic number, because the mean of its divisors is an integer number (130243273587).

Almost surely, 2^520420043413 is an apocalyptic number.

It is an amenable number.

520420043413 is a deficient number, since it is larger than the sum of its proper divisors (553050935).

520420043413 is an equidigital number, since it uses as much as digits as its factorization.

520420043413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553050934.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 520420043413 its reverse (314340024025), we get a palindrome (834760067438).

The spelling of 520420043413 in words is "five hundred twenty billion, four hundred twenty million, forty-three thousand, four hundred thirteen".