51166125215 has 4 divisors (see below), whose sum is σ = 61399350264. Its totient is φ = 40932900168.

The previous prime is 51166125181. The next prime is 51166125253. The reversal of 51166125215 is 51252166115.

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 51166125215 - 2⁸ = 51166124959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116612517 + ... + 5116612526.

It is an arithmetic number, because the mean of its divisors is an integer number (15349837566).

Almost surely, 2^51166125215 is an apocalyptic number.

51166125215 is a deficient number, since it is larger than the sum of its proper divisors (10233225049).

51166125215 is a wasteful number, since it uses less digits than its factorization.

51166125215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10233225048.

The product of its digits is 18000, while the sum is 35.

The spelling of 51166125215 in words is "fifty-one billion, one hundred sixty-six million, one hundred twenty-five thousand, two hundred fifteen".