51705152223 has 4 divisors (see below), whose sum is σ = 68940202968. Its totient is φ = 34470101480.

The previous prime is 51705152179. The next prime is 51705152293. The reversal of 51705152223 is 32225150715.

51705152223 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 is a cyclic number.

It is not a de Polignac number, because 51705152223 - 2⁹ = 51705151711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51705152293) 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, 8617525368 + ... + 8617525373.

It is an arithmetic number, because the mean of its divisors is an integer number (17235050742).

Almost surely, 2^51705152223 is an apocalyptic number.

51705152223 is a deficient number, since it is larger than the sum of its proper divisors (17235050745).

51705152223 is a wasteful number, since it uses less digits than its factorization.

51705152223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17235050744.

The product of its (nonzero) digits is 21000, while the sum is 33.

The spelling of 51705152223 in words is "fifty-one billion, seven hundred five million, one hundred fifty-two thousand, two hundred twenty-three".