51128056 has 32 divisors (see below), whose sum is σ = 109872000. Its totient is φ = 21849696.

The previous prime is 51128029. The next prime is 51128071. The reversal of 51128056 is 65082115.

It is a super-2 number, since 2×51128056² = 5228156220678272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22375 + ... + 24553.

It is an arithmetic number, because the mean of its divisors is an integer number (3433500).

Almost surely, 2^51128056 is an apocalyptic number.

51128056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51128056 is an abundant number, since it is smaller than the sum of its proper divisors (58743944).

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

51128056 is a wasteful number, since it uses less digits than its factorization.

51128056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611 (or 2607 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 51128056 is about 7150.3885209127. The cubic root of 51128056 is about 371.1531009602.

The spelling of 51128056 in words is "fifty-one million, one hundred twenty-eight thousand, fifty-six".