55051917 has 8 divisors (see below), whose sum is σ = 73571520. Its totient is φ = 36616800.

The previous prime is 55051907. The next prime is 55051937. The reversal of 55051917 is 71915055.

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

It is not a de Polignac number, because 55051917 - 2¹⁰ = 55050893 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55051907) 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, 19584 + ... + 22217.

It is an arithmetic number, because the mean of its divisors is an integer number (9196440).

Almost surely, 2^55051917 is an apocalyptic number.

It is an amenable number.

55051917 is a deficient number, since it is larger than the sum of its proper divisors (18519603).

55051917 is a wasteful number, since it uses less digits than its factorization.

55051917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42243.

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 55051917 is about 7419.6979049015. The cubic root of 55051917 is about 380.4148677682.

The spelling of 55051917 in words is "fifty-five million, fifty-one thousand, nine hundred seventeen".