515209997223 has 16 divisors (see below), whose sum is σ = 768135694560. Its totient is φ = 341285600448.

The previous prime is 515209997177. The next prime is 515209997257. The reversal of 515209997223 is 322799902515.

515209997223 is a `hidden beast` number, since 5 + 1 + 520 + 9 + 9 + 97 + 2 + 23 = 666.

It is not a de Polignac number, because 515209997223 - 2⁹ = 515209996711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 515209997223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515209997023) 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, 60765990 + ... + 60774467.

It is an arithmetic number, because the mean of its divisors is an integer number (48008480910).

Almost surely, 2^515209997223 is an apocalyptic number.

515209997223 is a deficient number, since it is larger than the sum of its proper divisors (252925697337).

515209997223 is a wasteful number, since it uses less digits than its factorization.

515209997223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121540623 (or 121540617 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 515209997223 in words is "five hundred fifteen billion, two hundred nine million, nine hundred ninety-seven thousand, two hundred twenty-three".