51506710207 has 4 divisors (see below), whose sum is σ = 51590190096. Its totient is φ = 51423230320.

The previous prime is 51506710201. The next prime is 51506710217. The reversal of 51506710207 is 70201760515.

It is a happy number.

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 51506710207 - 2²³ = 51498321599 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 (51506710201) 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, 41739019 + ... + 41740252.

It is an arithmetic number, because the mean of its divisors is an integer number (12897547524).

Almost surely, 2^51506710207 is an apocalyptic number.

51506710207 is a deficient number, since it is larger than the sum of its proper divisors (83479889).

51506710207 is an equidigital number, since it uses as much as digits as its factorization.

51506710207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83479888.

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 51506710207 in words is "fifty-one billion, five hundred six million, seven hundred ten thousand, two hundred seven".