55805869 has 16 divisors (see below), whose sum is σ = 67668480. Its totient is φ = 44956080.

The previous prime is 55805861. The next prime is 55805887. The reversal of 55805869 is 96850855.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55805869 - 2³ = 55805861 is a prime.

It is a super-2 number, since 2×55805869² = 6228590029690322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55805861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15822 + ... + 19024.

It is an arithmetic number, because the mean of its divisors is an integer number (4229280).

Almost surely, 2^55805869 is an apocalyptic number.

It is an amenable number.

55805869 is a deficient number, since it is larger than the sum of its proper divisors (11862611).

55805869 is a wasteful number, since it uses less digits than its factorization.

55805869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

The product of its (nonzero) digits is 432000, while the sum is 46.

The square root of 55805869 is about 7470.3325896509. The cubic root of 55805869 is about 382.1436303725.

It can be divided in two parts, 5580 and 5869, that added together give a square (11449 = 107²).

The spelling of 55805869 in words is "fifty-five million, eight hundred five thousand, eight hundred sixty-nine".