513204423 has 4 divisors (see below), whose sum is σ = 684272568. Its totient is φ = 342136280.

The previous prime is 513204409. The next prime is 513204431. The reversal of 513204423 is 324402315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513204423 - 2¹³ = 513196231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513204393 and 513204402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513204403) 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, 85534068 + ... + 85534073.

It is an arithmetic number, because the mean of its divisors is an integer number (171068142).

Almost surely, 2^513204423 is an apocalyptic number.

513204423 is a deficient number, since it is larger than the sum of its proper divisors (171068145).

513204423 is a wasteful number, since it uses less digits than its factorization.

513204423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171068144.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 513204423 is about 22654.0156043029. The cubic root of 513204423 is about 800.6268124003.

Adding to 513204423 its reverse (324402315), we get a palindrome (837606738).

The spelling of 513204423 in words is "five hundred thirteen million, two hundred four thousand, four hundred twenty-three".