100000056 has 32 divisors (see below), whose sum is σ = 269231760. Its totient is φ = 30769152.

The previous prime is 100000049. The next prime is 100000073. The reversal of 100000056 is 650000001.

100000056 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×100000056² = 20000022400006272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 99999987 and 100000050.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159945 + ... + 160568.

Almost surely, 2^100000056 is an apocalyptic number.

It is an amenable number.

100000056 is an abundant number, since it is smaller than the sum of its proper divisors (169231704).

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

100000056 is a wasteful number, since it uses less digits than its factorization.

100000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320535 (or 320531 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 100000056 is about 10000.0027999996. The cubic root of 100000056 is about 464.1589700043.

100000056 divided by its sum of digits (12) gives a palindrome (8333338).

Adding to 100000056 its reverse (650000001), we get a palindrome (750000057).

Subtracting 100000056 from its reverse (650000001), we obtain a palindrome (549999945).

The spelling of 100000056 in words is "one hundred million, fifty-six", and thus it is an aban number.