55405011 has 4 divisors (see below), whose sum is σ = 73873352. Its totient is φ = 36936672.

The previous prime is 55404997. The next prime is 55405067. The reversal of 55405011 is 11050455.

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

It is not a de Polignac number, because 55405011 - 2⁹ = 55404499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55405111) 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, 9234166 + ... + 9234171.

It is an arithmetic number, because the mean of its divisors is an integer number (18468338).

Almost surely, 2^55405011 is an apocalyptic number.

55405011 is a deficient number, since it is larger than the sum of its proper divisors (18468341).

55405011 is a wasteful number, since it uses less digits than its factorization.

55405011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18468340.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 55405011 is about 7443.4542384568. The cubic root of 55405011 is about 381.2264414001.

Adding to 55405011 its reverse (11050455), we get a palindrome (66455466).

The spelling of 55405011 in words is "fifty-five million, four hundred five thousand, eleven".