55210985 has 8 divisors (see below), whose sum is σ = 70150536. Its totient is φ = 41570560.

The previous prime is 55210963. The next prime is 55210997. The reversal of 55210985 is 58901255.

It can be written as a sum of positive squares in 4 ways, for example, as 11505664 + 43705321 = 3392^2 + 6611^2 .

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

It is not a de Polignac number, because 55210985 - 2⁶ = 55210921 is a prime.

It is a Duffinian 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, 324686 + ... + 324855.

It is an arithmetic number, because the mean of its divisors is an integer number (8768817).

Almost surely, 2^55210985 is an apocalyptic number.

It is an amenable number.

55210985 is a deficient number, since it is larger than the sum of its proper divisors (14939551).

55210985 is a wasteful number, since it uses less digits than its factorization.

55210985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649563.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 55210985 is about 7430.4094772765. The cubic root of 55210985 is about 380.7809079689.

The spelling of 55210985 in words is "fifty-five million, two hundred ten thousand, nine hundred eighty-five".