51560500 has 48 divisors (see below), whose sum is σ = 113834448. Its totient is φ = 20400000.

The previous prime is 51560497. The next prime is 51560519. The reversal of 51560500 is 506515.

It can be written as a sum of positive squares in 8 ways, for example, as 3701776 + 47858724 = 1924^2 + 6918^2 .

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, 49990 + ... + 51010.

It is an arithmetic number, because the mean of its divisors is an integer number (2371551).

Almost surely, 2^51560500 is an apocalyptic number.

51560500 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 51560500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56917224).

51560500 is an abundant number, since it is smaller than the sum of its proper divisors (62273948).

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

51560500 is a wasteful number, since it uses less digits than its factorization.

51560500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 51560500 is about 7180.5640446973. The cubic root of 51560500 is about 372.1965758755.

The spelling of 51560500 in words is "fifty-one million, five hundred sixty thousand, five hundred".