513121656454343 has 4 divisors (see below), whose sum is σ = 513127090260048. Its totient is φ = 513116222648640.

The previous prime is 513121656454261. The next prime is 513121656454349. The reversal of 513121656454343 is 343454656121315.

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 513121656454343 - 2⁸ = 513121656454087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513121656454349) 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, 2716761203 + ... + 2716950068.

It is an arithmetic number, because the mean of its divisors is an integer number (128281772565012).

Almost surely, 2^{513121656454343} is an apocalyptic number.

513121656454343 is a deficient number, since it is larger than the sum of its proper divisors (5433805705).

513121656454343 is an equidigital number, since it uses as much as digits as its factorization.

513121656454343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5433805704.

The product of its digits is 15552000, while the sum is 53.

The spelling of 513121656454343 in words is "five hundred thirteen trillion, one hundred twenty-one billion, six hundred fifty-six million, four hundred fifty-four thousand, three hundred forty-three".