51185146 has 8 divisors (see below), whose sum is σ = 77640660. Its totient is φ = 25304928.

The previous prime is 51185137. The next prime is 51185153. The reversal of 51185146 is 64158115.

51185146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50253921 + 931225 = 7089^2 + 965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 143601 + ... + 143956.

Almost surely, 2^51185146 is an apocalyptic number.

51185146 is a deficient number, since it is larger than the sum of its proper divisors (26455514).

51185146 is a wasteful number, since it uses less digits than its factorization.

51185146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287648.

The product of its digits is 4800, while the sum is 31.

The square root of 51185146 is about 7154.3794979020. The cubic root of 51185146 is about 371.2911937572.

The spelling of 51185146 in words is "fifty-one million, one hundred eighty-five thousand, one hundred forty-six".