51003128 has 64 divisors (see below), whose sum is σ = 111870720. Its totient is φ = 21542400.

The previous prime is 51003107. The next prime is 51003151. The reversal of 51003128 is 82130015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153923 + ... + 154253.

It is an arithmetic number, because the mean of its divisors is an integer number (1747980).

Almost surely, 2^51003128 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 51003128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55935360).

51003128 is an abundant number, since it is smaller than the sum of its proper divisors (60867592).

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

51003128 is a wasteful number, since it uses less digits than its factorization.

51003128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51003128 is about 7141.6474289900. The cubic root of 51003128 is about 370.8505584503.

It can be divided in two parts, 5100 and 3128, that added together give a palindrome (8228).

The spelling of 51003128 in words is "fifty-one million, three thousand, one hundred twenty-eight".