513110123 has 4 divisors (see below), whose sum is σ = 515976840. Its totient is φ = 510243408.

The previous prime is 513110111. The next prime is 513110141. The reversal of 513110123 is 321011315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513110123 - 2¹⁴ = 513093739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513110183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433090 + ... + 1433447.

It is an arithmetic number, because the mean of its divisors is an integer number (128994210).

Almost surely, 2^513110123 is an apocalyptic number.

513110123 is a deficient number, since it is larger than the sum of its proper divisors (2866717).

513110123 is a wasteful number, since it uses less digits than its factorization.

513110123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866716.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 513110123 is about 22651.9341999751. The cubic root of 513110123 is about 800.5777716869.

Adding to 513110123 its reverse (321011315), we get a palindrome (834121438).

The spelling of 513110123 in words is "five hundred thirteen million, one hundred ten thousand, one hundred twenty-three".