55987205 has 16 divisors (see below), whose sum is σ = 74882880. Its totient is φ = 39935232.

The previous prime is 55987201. The next prime is 55987207. The reversal of 55987205 is 50278955.

It is a cyclic number.

It is not a de Polignac number, because 55987205 - 2² = 55987201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55987201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15719 + ... + 18948.

It is an arithmetic number, because the mean of its divisors is an integer number (4680180).

Almost surely, 2^55987205 is an apocalyptic number.

It is an amenable number.

55987205 is a deficient number, since it is larger than the sum of its proper divisors (18895675).

55987205 is a wasteful number, since it uses less digits than its factorization.

55987205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34708.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 55987205 is about 7482.4598228123. The cubic root of 55987205 is about 382.5570962940.

The spelling of 55987205 in words is "fifty-five million, nine hundred eighty-seven thousand, two hundred five".