56161100 has 36 divisors (see below), whose sum is σ = 123429600. Its totient is φ = 22176960.

The previous prime is 56161087. The next prime is 56161121. The reversal of 56161100 is 116165.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4346 + ... + 11454.

It is an arithmetic number, because the mean of its divisors is an integer number (3428600).

Almost surely, 2^56161100 is an apocalyptic number.

56161100 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 56161100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61714800).

56161100 is an abundant number, since it is smaller than the sum of its proper divisors (67268500).

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

56161100 is a wasteful number, since it uses less digits than its factorization.

56161100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202 (or 7195 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 56161100 is about 7494.0709897892. The cubic root of 56161100 is about 382.9527581840.

Adding to 56161100 its reverse (116165), we get a palindrome (56277265).

The spelling of 56161100 in words is "fifty-six million, one hundred sixty-one thousand, one hundred".