55120311 has 32 divisors (see below), whose sum is σ = 86688000. Its totient is φ = 34517664.

The previous prime is 55120309. The next prime is 55120313. The reversal of 55120311 is 11302155.

55120311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55120309) and next prime (55120313).

It is not a de Polignac number, because 55120311 - 2¹ = 55120309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55120313) 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 31 ways as a sum of consecutive naturals, for example, 70921 + ... + 71693.

It is an arithmetic number, because the mean of its divisors is an integer number (2709000).

Almost surely, 2^55120311 is an apocalyptic number.

55120311 is a deficient number, since it is larger than the sum of its proper divisors (31567689).

55120311 is a wasteful number, since it uses less digits than its factorization.

55120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 55120311 is about 7424.3054220580. The cubic root of 55120311 is about 380.5723392893.

Adding to 55120311 its reverse (11302155), we get a palindrome (66422466).

The spelling of 55120311 in words is "fifty-five million, one hundred twenty thousand, three hundred eleven".