51159800 has 96 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 18739200.

The previous prime is 51159769. The next prime is 51159821. The reversal of 51159800 is 895115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139217 + ... + 139583.

It is an arithmetic number, because the mean of its divisors is an integer number (1347570).

Almost surely, 2^51159800 is an apocalyptic number.

51159800 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 51159800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64683360).

51159800 is an abundant number, since it is smaller than the sum of its proper divisors (78206920).

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

51159800 is a wasteful number, since it uses less digits than its factorization.

51159800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 51159800 is about 7152.6079159982. The cubic root of 51159800 is about 371.2298979770.

The spelling of 51159800 in words is "fifty-one million, one hundred fifty-nine thousand, eight hundred".