51233554513 has 4 divisors (see below), whose sum is σ = 51572849728. Its totient is φ = 50894259300.

The previous prime is 51233554507. The next prime is 51233554591. The reversal of 51233554513 is 31545533215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51233554513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51233554913) 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, 169647381 + ... + 169647682.

It is an arithmetic number, because the mean of its divisors is an integer number (12893212432).

Almost surely, 2^51233554513 is an apocalyptic number.

It is an amenable number.

51233554513 is a deficient number, since it is larger than the sum of its proper divisors (339295215).

51233554513 is a wasteful number, since it uses less digits than its factorization.

51233554513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339295214.

The product of its digits is 135000, while the sum is 37.

The spelling of 51233554513 in words is "fifty-one billion, two hundred thirty-three million, five hundred fifty-four thousand, five hundred thirteen".