55390085 has 8 divisors (see below), whose sum is σ = 67595040. Its totient is φ = 43560784.

The previous prime is 55390061. The next prime is 55390091. The reversal of 55390085 is 58009355.

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 55390085 - 2⁶ = 55390021 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93587 + ... + 94176.

It is an arithmetic number, because the mean of its divisors is an integer number (8449380).

Almost surely, 2^55390085 is an apocalyptic number.

It is an amenable number.

55390085 is a deficient number, since it is larger than the sum of its proper divisors (12204955).

55390085 is a wasteful number, since it uses less digits than its factorization.

55390085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187827.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 55390085 is about 7442.4515450220. The cubic root of 55390085 is about 381.1922044433.

The spelling of 55390085 in words is "fifty-five million, three hundred ninety thousand, eighty-five".