51494186 has 4 divisors (see below), whose sum is σ = 77241282. Its totient is φ = 25747092.

The previous prime is 51494167. The next prime is 51494189. The reversal of 51494186 is 68149415.

51494186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49434961 + 2059225 = 7031^2 + 1435^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51494189) 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 as a sum of consecutive naturals, namely, 12873545 + ... + 12873548.

Almost surely, 2^51494186 is an apocalyptic number.

51494186 is a deficient number, since it is larger than the sum of its proper divisors (25747096).

51494186 is a wasteful number, since it uses less digits than its factorization.

51494186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25747095.

The product of its digits is 34560, while the sum is 38.

The square root of 51494186 is about 7175.9449551958. The cubic root of 51494186 is about 372.0369418356.

The spelling of 51494186 in words is "fifty-one million, four hundred ninety-four thousand, one hundred eighty-six".