51054155213 has 4 divisors (see below), whose sum is σ = 51396800700. Its totient is φ = 50711509728.

The previous prime is 51054155129. The next prime is 51054155227. The reversal of 51054155213 is 31255145015.

51054155213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26661338089 + 24392817124 = 163283^2 + 156182^2 .

It is a cyclic number.

It is not a de Polignac number, because 51054155213 - 2¹⁰ = 51054154189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51054155213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51054155233) 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, 171322520 + ... + 171322817.

It is an arithmetic number, because the mean of its divisors is an integer number (12849200175).

Almost surely, 2^51054155213 is an apocalyptic number.

It is an amenable number.

51054155213 is a deficient number, since it is larger than the sum of its proper divisors (342645487).

51054155213 is a wasteful number, since it uses less digits than its factorization.

51054155213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342645486.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 51054155213 in words is "fifty-one billion, fifty-four million, one hundred fifty-five thousand, two hundred thirteen".