55590985 has 4 divisors (see below), whose sum is σ = 66709188. Its totient is φ = 44472784.

The previous prime is 55590961. The next prime is 55591007. The reversal of 55590985 is 58909555.

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 6702921 + 48888064 = 2589^2 + 6992^2 .

It is a cyclic number.

It is not a de Polignac number, because 55590985 - 2¹¹ = 55588937 is a prime.

It is a super-2 number, since 2×55590985² = 6180715226540450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5559094 + ... + 5559103.

It is an arithmetic number, because the mean of its divisors is an integer number (16677297).

Almost surely, 2^55590985 is an apocalyptic number.

It is an amenable number.

55590985 is a deficient number, since it is larger than the sum of its proper divisors (11118203).

55590985 is a wasteful number, since it uses less digits than its factorization.

55590985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11118202.

The product of its (nonzero) digits is 405000, while the sum is 46.

The square root of 55590985 is about 7455.9362255856. The cubic root of 55590985 is about 381.6525101271.

The spelling of 55590985 in words is "fifty-five million, five hundred ninety thousand, nine hundred eighty-five".