55093985 has 8 divisors (see below), whose sum is σ = 66767976. Its totient is φ = 43638400.

The previous prime is 55093981. The next prime is 55094003. The reversal of 55093985 is 58939055.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16703569 + 38390416 = 4087^2 + 6196^2 .

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

It is not a de Polignac number, because 55093985 - 2² = 55093981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55093981) 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, 54044 + ... + 55053.

It is an arithmetic number, because the mean of its divisors is an integer number (8345997).

Almost surely, 2^55093985 is an apocalyptic number.

It is an amenable number.

55093985 is a deficient number, since it is larger than the sum of its proper divisors (11673991).

55093985 is a wasteful number, since it uses less digits than its factorization.

55093985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109203.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 55093985 is about 7422.5322498457. The cubic root of 55093985 is about 380.5117412829.

The spelling of 55093985 in words is "fifty-five million, ninety-three thousand, nine hundred eighty-five".