55870287 has 16 divisors (see below), whose sum is σ = 83157888. Its totient is φ = 33072480.

The previous prime is 55870273. The next prime is 55870291. The reversal of 55870287 is 78207855.

It is a happy number.

55870287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55870287 - 2¹⁸ = 55608143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55870237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18268 + ... + 21105.

It is an arithmetic number, because the mean of its divisors is an integer number (5197368).

Almost surely, 2^55870287 is an apocalyptic number.

55870287 is a deficient number, since it is larger than the sum of its proper divisors (27287601).

55870287 is a wasteful number, since it uses less digits than its factorization.

55870287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39430.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 55870287 is about 7474.6429346157. The cubic root of 55870287 is about 382.2906128968.

The spelling of 55870287 in words is "fifty-five million, eight hundred seventy thousand, two hundred eighty-seven".