55012620 has 48 divisors (see below), whose sum is σ = 165886560. Its totient is φ = 13541376.

The previous prime is 55012613. The next prime is 55012621. The reversal of 55012620 is 2621055.

55012620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55012621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34485 + ... + 36044.

It is an arithmetic number, because the mean of its divisors is an integer number (3455970).

Almost surely, 2^55012620 is an apocalyptic number.

It is an amenable number.

55012620 is an abundant number, since it is smaller than the sum of its proper divisors (110873940).

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

55012620 is a wasteful number, since it uses less digits than its factorization.

55012620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70554 (or 70552 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55012620 is about 7417.0492785204. The cubic root of 55012620 is about 380.3243306760.

Adding to 55012620 its reverse (2621055), we get a palindrome (57633675).

The spelling of 55012620 in words is "fifty-five million, twelve thousand, six hundred twenty".