51128112 has 80 divisors (see below), whose sum is σ = 159846912. Its totient is φ = 13747200.

The previous prime is 51128101. The next prime is 51128113. The reversal of 51128112 is 21182115.

It is a super-2 number, since 2×51128112² = 5228167673369088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (51128113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237 + ... + 10187.

Almost surely, 2^51128112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51128112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79923456).

51128112 is an abundant number, since it is smaller than the sum of its proper divisors (108718800).

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

51128112 is a wasteful number, since it uses less digits than its factorization.

51128112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986 (or 8980 counting only the distinct ones).

The product of its digits is 160, while the sum is 21.

The square root of 51128112 is about 7150.3924367828. The cubic root of 51128112 is about 371.1532364668.

The spelling of 51128112 in words is "fifty-one million, one hundred twenty-eight thousand, one hundred twelve".