51310747073 has 4 divisors (see below), whose sum is σ = 51315841968. Its totient is φ = 51305652180.

The previous prime is 51310747067. The next prime is 51310747133. The reversal of 51310747073 is 37074701315.

It is a happy number.

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 not a de Polignac number, because 51310747073 - 2⁶ = 51310747009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51310747003) 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, 2532311 + ... + 2552492.

It is an arithmetic number, because the mean of its divisors is an integer number (12828960492).

Almost surely, 2^51310747073 is an apocalyptic number.

It is an amenable number.

51310747073 is a deficient number, since it is larger than the sum of its proper divisors (5094895).

51310747073 is a wasteful number, since it uses less digits than its factorization.

51310747073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094894.

The product of its (nonzero) digits is 61740, while the sum is 38.

The spelling of 51310747073 in words is "fifty-one billion, three hundred ten million, seven hundred forty-seven thousand, seventy-three".