55865810 has 64 divisors (see below), whose sum is σ = 135039744. Its totient is φ = 16070400.

The previous prime is 55865801. The next prime is 55865839. The reversal of 55865810 is 1856855.

55865810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55865810² = 6241977453912200, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7220 + ... + 12800.

It is an arithmetic number, because the mean of its divisors is an integer number (2109996).

Almost surely, 2^55865810 is an apocalyptic number.

55865810 is an abundant number, since it is smaller than the sum of its proper divisors (79173934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55865810 is a wasteful number, since it uses less digits than its factorization.

55865810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5619.

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 55865810 is about 7474.3434494275. The cubic root of 55865810 is about 382.2804013819.

The spelling of 55865810 in words is "fifty-five million, eight hundred sixty-five thousand, eight hundred ten".