56181400 has 48 divisors (see below), whose sum is σ = 142502040. Its totient is φ = 20428800.

The previous prime is 56181397. The next prime is 56181401. The reversal of 56181400 is 418165.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56181401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10569 + ... + 14968.

Almost surely, 2^56181400 is an apocalyptic number.

56181400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56181400 is an abundant number, since it is smaller than the sum of its proper divisors (86320640).

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

56181400 is a wasteful number, since it uses less digits than its factorization.

56181400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25564 (or 25555 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 56181400 is about 7495.4252714573. The cubic root of 56181400 is about 382.9988933471.

Adding to 56181400 its reverse (418165), we get a palindrome (56599565).

The spelling of 56181400 in words is "fifty-six million, one hundred eighty-one thousand, four hundred".