51616128 has 32 divisors (see below), whose sum is σ = 137106360. Its totient is φ = 17205248.

The previous prime is 51616093. The next prime is 51616139. The reversal of 51616128 is 82161615.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 51616095 and 51616104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66825 + ... + 67592.

Almost surely, 2^51616128 is an apocalyptic number.

It is an amenable number.

51616128 is an abundant number, since it is smaller than the sum of its proper divisors (85490232).

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

51616128 is a wasteful number, since it uses less digits than its factorization.

51616128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134434 (or 134422 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 51616128 is about 7184.4365123508. The cubic root of 51616128 is about 372.3303805620.

The spelling of 51616128 in words is "fifty-one million, six hundred sixteen thousand, one hundred twenty-eight".