56011500 has 144 divisors (see below), whose sum is σ = 183639456. Its totient is φ = 14904000.

The previous prime is 56011493. The next prime is 56011517. The reversal of 56011500 is 511065.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121270 + ... + 121730.

It is an arithmetic number, because the mean of its divisors is an integer number (1275274).

Almost surely, 2^56011500 is an apocalyptic number.

56011500 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 56011500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91819728).

56011500 is an abundant number, since it is smaller than the sum of its proper divisors (127627956).

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

56011500 is a wasteful number, since it uses less digits than its factorization.

56011500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 56011500 is about 7484.0831101746. The cubic root of 56011500 is about 382.6124237008.

Adding to 56011500 its reverse (511065), we get a palindrome (56522565).

The spelling of 56011500 in words is "fifty-six million, eleven thousand, five hundred".