55136889 has 8 divisors (see below), whose sum is σ = 81684320. Its totient is φ = 36757908.

The previous prime is 55136867. The next prime is 55136891. The reversal of 55136889 is 98863155.

55136889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55136889 - 2¹² = 55132793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55136089) 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 in 7 ways as a sum of consecutive naturals, for example, 1021027 + ... + 1021080.

It is an arithmetic number, because the mean of its divisors is an integer number (10210540).

Almost surely, 2^55136889 is an apocalyptic number.

It is an amenable number.

55136889 is a deficient number, since it is larger than the sum of its proper divisors (26547431).

55136889 is a wasteful number, since it uses less digits than its factorization.

55136889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042116 (or 2042110 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55136889 is about 7425.4218062006. The cubic root of 55136889 is about 380.6104891457.

The spelling of 55136889 in words is "fifty-five million, one hundred thirty-six thousand, eight hundred eighty-nine".