55598591 has 8 divisors (see below), whose sum is σ = 57075840. Its totient is φ = 54139288.

The previous prime is 55598563. The next prime is 55598639. The reversal of 55598591 is 19589555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55598591 - 2¹⁰ = 55597567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55298591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (7134480).

Almost surely, 2^55598591 is an apocalyptic number.

55598591 is a deficient number, since it is larger than the sum of its proper divisors (1477249).

55598591 is a wasteful number, since it uses less digits than its factorization.

55598591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973.

The product of its digits is 405000, while the sum is 47.

The square root of 55598591 is about 7456.4462715157. The cubic root of 55598591 is about 381.6699153270.

The spelling of 55598591 in words is "fifty-five million, five hundred ninety-eight thousand, five hundred ninety-one".