55000012 has 12 divisors (see below), whose sum is σ = 96599440. Its totient is φ = 27400176.

The previous prime is 54999943. The next prime is 55000013. The reversal of 55000012 is 21000055.

It is a junction number, because it is equal to n+sod(n) for n = 54999956 and 55000001.

It is not an unprimeable number, because it can be changed into a prime (55000013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23712 + ... + 25927.

Almost surely, 2^55000012 is an apocalyptic number.

It is an amenable number.

55000012 is a deficient number, since it is larger than the sum of its proper divisors (41599428).

55000012 is a wasteful number, since it uses less digits than its factorization.

55000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49920 (or 49918 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 55000012 is about 7416.1992961355. The cubic root of 55000012 is about 380.2952737340.

Adding to 55000012 its reverse (21000055), we get a palindrome (76000067).

The spelling of 55000012 in words is "fifty-five million, twelve", and thus it is an aban number and an uban number.