55109887 has 8 divisors (see below), whose sum is σ = 63140000. Its totient is φ = 47119104.

The previous prime is 55109881. The next prime is 55109891. The reversal of 55109887 is 78890155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55109887 - 2¹⁹ = 54585599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55109881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6762 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (7892500).

Almost surely, 2^55109887 is an apocalyptic number.

55109887 is a deficient number, since it is larger than the sum of its proper divisors (8030113).

55109887 is a wasteful number, since it uses less digits than its factorization.

55109887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19665.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 55109887 is about 7423.6033703317. The cubic root of 55109887 is about 380.5483473095.

The spelling of 55109887 in words is "fifty-five million, one hundred nine thousand, eight hundred eighty-seven".