51023128 has 32 divisors (see below), whose sum is σ = 103672800. Its totient is φ = 23541024.

The previous prime is 51023107. The next prime is 51023129. The reversal of 51023128 is 82132015.

It is a junction number, because it is equal to n+sod(n) for n = 51023099 and 51023108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16125 + ... + 19027.

It is an arithmetic number, because the mean of its divisors is an integer number (3239775).

Almost surely, 2^51023128 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 51023128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51836400).

51023128 is an abundant number, since it is smaller than the sum of its proper divisors (52649672).

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

51023128 is a wasteful number, since it uses less digits than its factorization.

51023128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 51023128 is about 7143.0475288913. The cubic root of 51023128 is about 370.8990263396.

The spelling of 51023128 in words is "fifty-one million, twenty-three thousand, one hundred twenty-eight".