55115717 has 8 divisors (see below), whose sum is σ = 58430016. Its totient is φ = 51809472.

The previous prime is 55115701. The next prime is 55115729. The reversal of 55115717 is 71751155.

It is a happy number.

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

It is not a de Polignac number, because 55115717 - 2⁴ = 55115701 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 (55115017) 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, 17648 + ... + 20534.

It is an arithmetic number, because the mean of its divisors is an integer number (7303752).

Almost surely, 2^55115717 is an apocalyptic number.

It is an amenable number.

55115717 is a deficient number, since it is larger than the sum of its proper divisors (3314299).

55115717 is a wasteful number, since it uses less digits than its factorization.

55115717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027.

The product of its digits is 6125, while the sum is 32.

The square root of 55115717 is about 7423.9960263998. The cubic root of 55115717 is about 380.5617660671.

The spelling of 55115717 in words is "fifty-five million, one hundred fifteen thousand, seven hundred seventeen".