55112020 has 12 divisors (see below), whose sum is σ = 115735284. Its totient is φ = 22044800.

The previous prime is 55112009. The next prime is 55112033. The reversal of 55112020 is 2021155.

It can be written as a sum of positive squares in 2 ways, for example, as 44063044 + 11048976 = 6638^2 + 3324^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55111985 and 55112003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377781 + ... + 1377820.

It is an arithmetic number, because the mean of its divisors is an integer number (9644607).

Almost surely, 2^55112020 is an apocalyptic number.

It is an amenable number.

55112020 is an abundant number, since it is smaller than the sum of its proper divisors (60623264).

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

55112020 is a wasteful number, since it uses less digits than its factorization.

55112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755610 (or 2755608 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55112020 is about 7423.7470323281. The cubic root of 55112020 is about 380.5532568892.

Adding to 55112020 its reverse (2021155), we get a palindrome (57133175).

It can be divided in two parts, 551120 and 20, that multiplied together give a square (11022400 = 3320²).

The spelling of 55112020 in words is "fifty-five million, one hundred twelve thousand, twenty".