55512511 has 4 divisors (see below), whose sum is σ = 55550032. Its totient is φ = 55474992.

The previous prime is 55512487. The next prime is 55512517. The reversal of 55512511 is 11521555.

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 55512511 - 2⁹ = 55511999 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 (55512517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16446 + ... + 19531.

It is an arithmetic number, because the mean of its divisors is an integer number (13887508).

Almost surely, 2^55512511 is an apocalyptic number.

55512511 is a deficient number, since it is larger than the sum of its proper divisors (37521).

55512511 is a wasteful number, since it uses less digits than its factorization.

55512511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37520.

The product of its digits is 1250, while the sum is 25.

The square root of 55512511 is about 7450.6718489006. The cubic root of 55512511 is about 381.4728412903.

The spelling of 55512511 in words is "fifty-five million, five hundred twelve thousand, five hundred eleven".