51197966 has 16 divisors (see below), whose sum is σ = 78337584. Its totient is φ = 25089984.

The previous prime is 51197959. The next prime is 51197981. The reversal of 51197966 is 66979115.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24245 + ... + 26271.

It is an arithmetic number, because the mean of its divisors is an integer number (4896099).

Almost surely, 2^51197966 is an apocalyptic number.

51197966 is a deficient number, since it is larger than the sum of its proper divisors (27139618).

51197966 is a wasteful number, since it uses less digits than its factorization.

51197966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275.

The product of its digits is 102060, while the sum is 44.

The square root of 51197966 is about 7155.2753965169. The cubic root of 51197966 is about 371.3221894407.

The spelling of 51197966 in words is "fifty-one million, one hundred ninety-seven thousand, nine hundred sixty-six".