51185616 has 20 divisors (see below), whose sum is σ = 132229632. Its totient is φ = 17061856.

The previous prime is 51185599. The next prime is 51185653. The reversal of 51185616 is 61658115.

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 3 ways as a sum of consecutive naturals, for example, 533136 + ... + 533231.

Almost surely, 2^51185616 is an apocalyptic number.

It is an amenable number.

51185616 is an abundant number, since it is smaller than the sum of its proper divisors (81044016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51185616 is a wasteful number, since it uses less digits than its factorization.

51185616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066378 (or 1066372 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The square root of 51185616 is about 7154.4123448401. The cubic root of 51185616 is about 371.2923301958.

The spelling of 51185616 in words is "fifty-one million, one hundred eighty-five thousand, six hundred sixteen".