55655517 has 8 divisors (see below), whose sum is σ = 74244960. Its totient is φ = 37084880.

The previous prime is 55655513. The next prime is 55655519. The reversal of 55655517 is 71555655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55655517 - 2² = 55655513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55655513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5167 + ... + 11747.

It is an arithmetic number, because the mean of its divisors is an integer number (9280620).

Almost surely, 2^55655517 is an apocalyptic number.

It is an amenable number.

55655517 is a deficient number, since it is larger than the sum of its proper divisors (18589443).

55655517 is a wasteful number, since it uses less digits than its factorization.

55655517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9403.

The product of its digits is 131250, while the sum is 39.

The square root of 55655517 is about 7460.2625288927. The cubic root of 55655517 is about 381.8001316400.

The spelling of 55655517 in words is "fifty-five million, six hundred fifty-five thousand, five hundred seventeen".