520240413 has 32 divisors (see below), whose sum is σ = 876690432. Its totient is φ = 266544000.

The previous prime is 520240411. The next prime is 520240423. The reversal of 520240413 is 314042025.

It is not a de Polignac number, because 520240413 - 2¹ = 520240411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 520240413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520240411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1438 + ... + 32288.

It is an arithmetic number, because the mean of its divisors is an integer number (27396576).

Almost surely, 2^520240413 is an apocalyptic number.

It is an amenable number.

520240413 is a deficient number, since it is larger than the sum of its proper divisors (356450019).

520240413 is a wasteful number, since it uses less digits than its factorization.

520240413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30945.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 520240413 is about 22808.7792965779. The cubic root of 520240413 is about 804.2690601551.

Adding to 520240413 its reverse (314042025), we get a palindrome (834282438).

The spelling of 520240413 in words is "five hundred twenty million, two hundred forty thousand, four hundred thirteen".