51173516201 has 4 divisors (see below), whose sum is σ = 53398451712. Its totient is φ = 48948580692.

The previous prime is 51173516189. The next prime is 51173516209. The reversal of 51173516201 is 10261537115.

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 51173516201 - 2⁶ = 51173516137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51173516209) 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, 1112467721 + ... + 1112467766.

It is an arithmetic number, because the mean of its divisors is an integer number (13349612928).

Almost surely, 2^51173516201 is an apocalyptic number.

It is an amenable number.

51173516201 is a deficient number, since it is larger than the sum of its proper divisors (2224935511).

51173516201 is a wasteful number, since it uses less digits than its factorization.

51173516201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224935510.

The product of its (nonzero) digits is 6300, while the sum is 32.

The spelling of 51173516201 in words is "fifty-one billion, one hundred seventy-three million, five hundred sixteen thousand, two hundred one".