55339985 has 4 divisors (see below), whose sum is σ = 66407988. Its totient is φ = 44271984.

The previous prime is 55339979. The next prime is 55339987. The reversal of 55339985 is 58993355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38291344 + 17048641 = 6188^2 + 4129^2 .

It is a cyclic number.

It is not a de Polignac number, because 55339985 - 2⁸ = 55339729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55339987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5533994 + ... + 5534003.

It is an arithmetic number, because the mean of its divisors is an integer number (16601997).

Almost surely, 2^55339985 is an apocalyptic number.

It is an amenable number.

55339985 is a deficient number, since it is larger than the sum of its proper divisors (11068003).

55339985 is a wasteful number, since it uses less digits than its factorization.

55339985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068002.

The product of its digits is 729000, while the sum is 47.

The square root of 55339985 is about 7439.0849571705. The cubic root of 55339985 is about 381.0772410868.

The spelling of 55339985 in words is "fifty-five million, three hundred thirty-nine thousand, nine hundred eighty-five".