55120911 has 16 divisors (see below), whose sum is σ = 74412000. Its totient is φ = 36291968.

The previous prime is 55120873. The next prime is 55120937. The reversal of 55120911 is 11902155.

It is a cyclic number.

It is not a de Polignac number, because 55120911 - 2⁹ = 55120399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55120981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141505 + ... + 141893.

It is an arithmetic number, because the mean of its divisors is an integer number (4650750).

Almost surely, 2^55120911 is an apocalyptic number.

55120911 is a deficient number, since it is larger than the sum of its proper divisors (19291089).

55120911 is a wasteful number, since it uses less digits than its factorization.

55120911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 55120911 is about 7424.3458297684. The cubic root of 55120911 is about 380.5737201631.

The spelling of 55120911 in words is "fifty-five million, one hundred twenty thousand, nine hundred eleven".