513125123 has 8 divisors (see below), whose sum is σ = 587688192. Its totient is φ = 438876936.

The previous prime is 513125099. The next prime is 513125131. The reversal of 513125123 is 321521315.

It is a happy number.

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 513125123 - 2¹⁰ = 513124099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513125323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75215 + ... + 81752.

It is an arithmetic number, because the mean of its divisors is an integer number (73461024).

Almost surely, 2^513125123 is an apocalyptic number.

513125123 is a deficient number, since it is larger than the sum of its proper divisors (74563069).

513125123 is a wasteful number, since it uses less digits than its factorization.

513125123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157441.

The product of its digits is 900, while the sum is 23.

The square root of 513125123 is about 22652.2652951090. The cubic root of 513125123 is about 800.5855728385.

Adding to 513125123 its reverse (321521315), we get a palindrome (834646438).

The spelling of 513125123 in words is "five hundred thirteen million, one hundred twenty-five thousand, one hundred twenty-three".