55106987 has 4 divisors (see below), whose sum is σ = 59346000. Its totient is φ = 50867976.

The previous prime is 55106981. The next prime is 55106999. The reversal of 55106987 is 78960155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55106987 - 2⁶ = 55106923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55106981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2119487 + ... + 2119512.

It is an arithmetic number, because the mean of its divisors is an integer number (14836500).

Almost surely, 2^55106987 is an apocalyptic number.

55106987 is a deficient number, since it is larger than the sum of its proper divisors (4239013).

55106987 is a wasteful number, since it uses less digits than its factorization.

55106987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239012.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 55106987 is about 7423.4080448269. The cubic root of 55106987 is about 380.5416721034.

The spelling of 55106987 in words is "fifty-five million, one hundred six thousand, nine hundred eighty-seven".