523340013 has 16 divisors (see below), whose sum is σ = 805216256. Its totient is φ = 296146800.

The previous prime is 523340011. The next prime is 523340021. The reversal of 523340013 is 310043325.

It is not a de Polignac number, because 523340013 - 2¹ = 523340011 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523340011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118813 + ... + 123138.

It is an arithmetic number, because the mean of its divisors is an integer number (50326016).

Almost surely, 2^523340013 is an apocalyptic number.

It is an amenable number.

523340013 is a deficient number, since it is larger than the sum of its proper divisors (281876243).

523340013 is a wasteful number, since it uses less digits than its factorization.

523340013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242064.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 523340013 is about 22876.6259094299. The cubic root of 523340013 is about 805.8631806831.

Adding to 523340013 its reverse (310043325), we get a palindrome (833383338).

The spelling of 523340013 in words is "five hundred twenty-three million, three hundred forty thousand, thirteen".