513005423 has 16 divisors (see below), whose sum is σ = 604108800. Its totient is φ = 426523776.

The previous prime is 513005417. The next prime is 513005431. The reversal of 513005423 is 324500315.

It is not a de Polignac number, because 513005423 - 2⁶ = 513005359 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 (513005023) 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, 30278 + ... + 44076.

It is an arithmetic number, because the mean of its divisors is an integer number (37756800).

Almost surely, 2^513005423 is an apocalyptic number.

513005423 is a deficient number, since it is larger than the sum of its proper divisors (91103377).

513005423 is a wasteful number, since it uses less digits than its factorization.

513005423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13966.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 513005423 is about 22649.6230211454. The cubic root of 513005423 is about 800.5233154141.

Adding to 513005423 its reverse (324500315), we get a palindrome (837505738).

The spelling of 513005423 in words is "five hundred thirteen million, five thousand, four hundred twenty-three".