55872289 has 4 divisors (see below), whose sum is σ = 60951600. Its totient is φ = 50792980.

The previous prime is 55872287. The next prime is 55872307. The reversal of 55872289 is 98227855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55872289 - 2¹ = 55872287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55872283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2539639 + ... + 2539660.

It is an arithmetic number, because the mean of its divisors is an integer number (15237900).

Almost surely, 2^55872289 is an apocalyptic number.

It is an amenable number.

55872289 is a deficient number, since it is larger than the sum of its proper divisors (5079311).

55872289 is a wasteful number, since it uses less digits than its factorization.

55872289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079310.

The product of its digits is 403200, while the sum is 46.

The square root of 55872289 is about 7474.7768528565. The cubic root of 55872289 is about 382.2951790488.

The spelling of 55872289 in words is "fifty-five million, eight hundred seventy-two thousand, two hundred eighty-nine".