513820423 has 8 divisors (see below), whose sum is σ = 517698720. Its totient is φ = 509952000.

The previous prime is 513820409. The next prime is 513820453. The reversal of 513820423 is 324028315.

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 513820423 - 2²⁵ = 480265991 is a prime.

It is a super-2 number, since 2×513820423² = 528022854183797858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513820391 and 513820400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513820453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126423 + ... + 130423.

It is an arithmetic number, because the mean of its divisors is an integer number (64712340).

Almost surely, 2^513820423 is an apocalyptic number.

513820423 is a deficient number, since it is larger than the sum of its proper divisors (3878297).

513820423 is a wasteful number, since it uses less digits than its factorization.

513820423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 513820423 is about 22667.6073505785. The cubic root of 513820423 is about 800.9470154889.

Adding to 513820423 its reverse (324028315), we get a palindrome (837848738).

The spelling of 513820423 in words is "five hundred thirteen million, eight hundred twenty thousand, four hundred twenty-three".