51023000 has 128 divisors (see below), whose sum is σ = 140849280. Its totient is φ = 16934400.

The previous prime is 51022997. The next prime is 51023053. The reversal of 51023000 is 32015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258902 + ... + 259098.

It is an arithmetic number, because the mean of its divisors is an integer number (1100385).

Almost surely, 2^51023000 is an apocalyptic number.

51023000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51023000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70424640).

51023000 is an abundant number, since it is smaller than the sum of its proper divisors (89826280).

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

51023000 is a wasteful number, since it uses less digits than its factorization.

51023000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 51023000 is about 7143.0385691245. The cubic root of 51023000 is about 370.8987161854.

Adding to 51023000 its reverse (32015), we get a palindrome (51055015).

The spelling of 51023000 in words is "fifty-one million, twenty-three thousand".