513544121151323 has 4 divisors (see below), whose sum is σ = 513563345680008. Its totient is φ = 513524896622640.

The previous prime is 513544121151319. The next prime is 513544121151331. The reversal of 513544121151323 is 323151121445315.

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 513544121151323 - 2² = 513544121151319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513544121151343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9612224273 + ... + 9612277698.

It is an arithmetic number, because the mean of its divisors is an integer number (128390836420002).

Almost surely, 2^{513544121151323} is an apocalyptic number.

513544121151323 is a deficient number, since it is larger than the sum of its proper divisors (19224528685).

513544121151323 is a wasteful number, since it uses less digits than its factorization.

513544121151323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19224528684.

The product of its digits is 216000, while the sum is 41.

Adding to 513544121151323 its reverse (323151121445315), we get a palindrome (836695242596638).

The spelling of 513544121151323 in words is "five hundred thirteen trillion, five hundred forty-four billion, one hundred twenty-one million, one hundred fifty-one thousand, three hundred twenty-three".