55019887 has 8 divisors (see below), whose sum is σ = 61828704. Its totient is φ = 48579168.

The previous prime is 55019879. The next prime is 55019897. The reversal of 55019887 is 78891055.

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 55019887 - 2³ = 55019879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55019807) 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, 91708 + ... + 92305.

It is an arithmetic number, because the mean of its divisors is an integer number (7728588).

Almost surely, 2^55019887 is an apocalyptic number.

55019887 is a deficient number, since it is larger than the sum of its proper divisors (6808817).

55019887 is a wasteful number, since it uses less digits than its factorization.

55019887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184049.

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

The square root of 55019887 is about 7417.5391471835. The cubic root of 55019887 is about 380.3410765016.

The spelling of 55019887 in words is "fifty-five million, nineteen thousand, eight hundred eighty-seven".