55011889 has 3 divisors (see below), whose sum is σ = 55019307. Its totient is φ = 55004472.

The previous prime is 55011871. The next prime is 55011911. The reversal of 55011889 is 98811055.

The square root of 55011889 is 7417.

It is a perfect power (a square), and thus also a powerful number.

55011889 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 a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 10188864 = 6695^2 + 3192^2 .

It is not a de Polignac number, because 55011889 - 2²³ = 46623281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55011839) 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 2 ways as a sum of consecutive naturals, for example, 3709 + ... + 11125.

It is an arithmetic number, because the mean of its divisors is an integer number (18339769).

Almost surely, 2^55011889 is an apocalyptic number.

55011889 is the 7417-th square number.

55011889 is the 3709-th centered octagonal number.

It is an amenable number.

55011889 is a deficient number, since it is larger than the sum of its proper divisors (7418).

55011889 is an frugal number, since it uses more digits than its factorization.

55011889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14834 (or 7417 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 37.

The cubic root of 55011889 is about 380.3226461030.

Multiplying 55011889 by its product of nonzero digits (14400), we get a square (792171201600 = 890040²).

The spelling of 55011889 in words is "fifty-five million, eleven thousand, eight hundred eighty-nine".