55601111 has 4 divisors (see below), whose sum is σ = 55671672. Its totient is φ = 55530552.

The previous prime is 55601071. The next prime is 55601123. The reversal of 55601111 is 11110655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55601111 - 2¹⁰ = 55600087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55601131) 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, 34085 + ... + 35678.

It is an arithmetic number, because the mean of its divisors is an integer number (13917918).

Almost surely, 2^55601111 is an apocalyptic number.

55601111 is a deficient number, since it is larger than the sum of its proper divisors (70561).

55601111 is an equidigital number, since it uses as much as digits as its factorization.

55601111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70560.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 55601111 is about 7456.6152509031. The cubic root of 55601111 is about 381.6756816221.

Adding to 55601111 its reverse (11110655), we get a palindrome (66711766).

The spelling of 55601111 in words is "fifty-five million, six hundred one thousand, one hundred eleven".