55136986 has 4 divisors (see below), whose sum is σ = 82705482. Its totient is φ = 27568492.

The previous prime is 55136953. The next prime is 55136989. The reversal of 55136986 is 68963155.

55136986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68963155 = 5 ⋅13792631.

It can be written as a sum of positive squares in only one way, i.e., 33281361 + 21855625 = 5769^2 + 4675^2 .

It is not an unprimeable number, because it can be changed into a prime (55136989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13784245 + ... + 13784248.

Almost surely, 2^55136986 is an apocalyptic number.

55136986 is a deficient number, since it is larger than the sum of its proper divisors (27568496).

55136986 is a wasteful number, since it uses less digits than its factorization.

55136986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27568495.

The product of its digits is 194400, while the sum is 43.

The square root of 55136986 is about 7425.4283378132. The cubic root of 55136986 is about 380.6107123428.

The spelling of 55136986 in words is "fifty-five million, one hundred thirty-six thousand, nine hundred eighty-six".