51946191 has 40 divisors (see below), whose sum is σ = 85395024. Its totient is φ = 31207680.

The previous prime is 51946189. The next prime is 51946199. The reversal of 51946191 is 19164915.

51946191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51946191 - 2¹ = 51946189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51946199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 153975 + ... + 154311.

Almost surely, 2^51946191 is an apocalyptic number.

51946191 is a deficient number, since it is larger than the sum of its proper divisors (33448833).

51946191 is a wasteful number, since it uses less digits than its factorization.

51946191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 524 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 51946191 is about 7207.3706023764. The cubic root of 51946191 is about 373.1223259322.

The spelling of 51946191 in words is "fifty-one million, nine hundred forty-six thousand, one hundred ninety-one".