55119987 has 16 divisors (see below), whose sum is σ = 87941280. Its totient is φ = 33919776.

The previous prime is 55119979. The next prime is 55119997. The reversal of 55119987 is 78991155.

55119987 is a `hidden beast` number, since 551 + 1 + 9 + 98 + 7 = 666.

It is not a de Polignac number, because 55119987 - 2³ = 55119979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55119997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78168 + ... + 78869.

It is an arithmetic number, because the mean of its divisors is an integer number (5496330).

Almost surely, 2^55119987 is an apocalyptic number.

55119987 is a deficient number, since it is larger than the sum of its proper divisors (32821293).

55119987 is a wasteful number, since it uses less digits than its factorization.

55119987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157059 (or 157053 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 55119987 is about 7424.2836018029. The cubic root of 55119987 is about 380.5715936133.

The spelling of 55119987 in words is "fifty-five million, one hundred nineteen thousand, nine hundred eighty-seven".