56530000 has 50 divisors (see below), whose sum is σ = 136888994. Its totient is φ = 22608000.

The previous prime is 56529989. The next prime is 56530007. The reversal of 56530000 is 3565.

It can be written as a sum of positive squares in 5 ways, for example, as 14227984 + 42302016 = 3772^2 + 6504^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a self number, because there is not a number n which added to its sum of digits gives 56530000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56530007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7174 + ... + 12826.

Almost surely, 2^56530000 is an apocalyptic number.

56530000 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 56530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68444497).

56530000 is an abundant number, since it is smaller than the sum of its proper divisors (80358994).

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

56530000 is an equidigital number, since it uses as much as digits as its factorization.

56530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681 (or 5660 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 56530000 is about 7518.6434946738. The cubic root of 56530000 is about 383.7894172358.

Adding to 56530000 its reverse (3565), we get a palindrome (56533565).

The spelling of 56530000 in words is "fifty-six million, five hundred thirty thousand".