51165203279 has 4 divisors (see below), whose sum is σ = 51812864160. Its totient is φ = 50517542400.

The previous prime is 51165203213. The next prime is 51165203281. The reversal of 51165203279 is 97230256115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97230256115 = 5 ⋅19446051223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51165203279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51165203209) 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, 323830322 + ... + 323830479.

It is an arithmetic number, because the mean of its divisors is an integer number (12953216040).

Almost surely, 2^51165203279 is an apocalyptic number.

51165203279 is a deficient number, since it is larger than the sum of its proper divisors (647660881).

51165203279 is an equidigital number, since it uses as much as digits as its factorization.

51165203279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647660880.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 51165203279 in words is "fifty-one billion, one hundred sixty-five million, two hundred three thousand, two hundred seventy-nine".