55578317 has 8 divisors (see below), whose sum is σ = 57594240. Its totient is φ = 53595360.

The previous prime is 55578311. The next prime is 55578323. The reversal of 55578317 is 71387555.

It is an interprime number because it is at equal distance from previous prime (55578311) and next prime (55578323).

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 55578317 - 2⁴ = 55578301 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 (55578311) 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, 4784 + ... + 11577.

It is an arithmetic number, because the mean of its divisors is an integer number (7199280).

Almost surely, 2^55578317 is an apocalyptic number.

It is an amenable number.

55578317 is a deficient number, since it is larger than the sum of its proper divisors (2015923).

55578317 is a wasteful number, since it uses less digits than its factorization.

55578317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16483.

The product of its digits is 147000, while the sum is 41.

The square root of 55578317 is about 7455.0866527492. The cubic root of 55578317 is about 381.6235177686.

The spelling of 55578317 in words is "fifty-five million, five hundred seventy-eight thousand, three hundred seventeen".