516403323 has 24 divisors (see below), whose sum is σ = 784850640. Its totient is φ = 335380320.

The previous prime is 516403313. The next prime is 516403331. The reversal of 516403323 is 323304615.

It is a happy number.

It is not a de Polignac number, because 516403323 - 2²⁶ = 449294459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (516403313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 755740 + ... + 756422.

It is an arithmetic number, because the mean of its divisors is an integer number (32702110).

Almost surely, 2^516403323 is an apocalyptic number.

516403323 is a deficient number, since it is larger than the sum of its proper divisors (268447317).

516403323 is an frugal number, since it uses more digits than its factorization.

516403323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 516403323 is about 22724.5093016329. The cubic root of 516403323 is about 802.2868540401.

Adding to 516403323 its reverse (323304615), we get a palindrome (839707938).

The spelling of 516403323 in words is "five hundred sixteen million, four hundred three thousand, three hundred twenty-three".