55556289 has 24 divisors (see below), whose sum is σ = 85573800. Its totient is φ = 34610688.

The previous prime is 55556279. The next prime is 55556311. The reversal of 55556289 is 98265555.

55556289 is a `hidden beast` number, since 5 + 5 + 5 + 562 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17363889 + 38192400 = 4167^2 + 6180^2 .

It is not a de Polignac number, because 55556289 - 2⁴ = 55556273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55556279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21579 + ... + 24015.

It is an arithmetic number, because the mean of its divisors is an integer number (3565575).

Almost surely, 2^55556289 is an apocalyptic number.

It is an amenable number.

55556289 is a deficient number, since it is larger than the sum of its proper divisors (30017511).

55556289 is a wasteful number, since it uses less digits than its factorization.

55556289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2606 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The square root of 55556289 is about 7453.6091257860. The cubic root of 55556289 is about 381.5730933457.

The spelling of 55556289 in words is "fifty-five million, five hundred fifty-six thousand, two hundred eighty-nine".