55557517 has 4 divisors (see below), whose sum is σ = 55595520. Its totient is φ = 55519516.

The previous prime is 55557511. The next prime is 55557521. The reversal of 55557517 is 71575555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55557517 - 2⁷ = 55557389 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55557517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55557511) 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, 16717 + ... + 19762.

It is an arithmetic number, because the mean of its divisors is an integer number (13898880).

Almost surely, 2^55557517 is an apocalyptic number.

It is an amenable number.

55557517 is a deficient number, since it is larger than the sum of its proper divisors (38003).

55557517 is a wasteful number, since it uses less digits than its factorization.

55557517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38002.

The product of its digits is 153125, while the sum is 40.

The square root of 55557517 is about 7453.6915015313. The cubic root of 55557517 is about 381.5759047184.

The spelling of 55557517 in words is "fifty-five million, five hundred fifty-seven thousand, five hundred seventeen".