55911517 has 4 divisors (see below), whose sum is σ = 55965276. Its totient is φ = 55857760.

The previous prime is 55911497. The next prime is 55911523. The reversal of 55911517 is 71511955.

It is a happy number.

55911517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48149721 + 7761796 = 6939^2 + 2786^2 .

It is a cyclic number.

It is not a de Polignac number, because 55911517 - 2¹⁹ = 55387229 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 (55911917) 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 3 ways as a sum of consecutive naturals, for example, 25288 + ... + 27409.

It is an arithmetic number, because the mean of its divisors is an integer number (13991319).

Almost surely, 2^55911517 is an apocalyptic number.

It is an amenable number.

55911517 is a deficient number, since it is larger than the sum of its proper divisors (53759).

55911517 is a wasteful number, since it uses less digits than its factorization.

55911517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53758.

The product of its digits is 7875, while the sum is 34.

The square root of 55911517 is about 7477.4004172573. The cubic root of 55911517 is about 382.3846280833.

The spelling of 55911517 in words is "fifty-five million, nine hundred eleven thousand, five hundred seventeen".