55558493 has 4 divisors (see below), whose sum is σ = 55865628. Its totient is φ = 55251360.

The previous prime is 55558483. The next prime is 55558513. The reversal of 55558493 is 39485555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21883684 + 33674809 = 4678^2 + 5803^2 .

It is a cyclic number.

It is not a de Polignac number, because 55558493 - 2⁶ = 55558429 is a prime.

It is a super-2 number, since 2×55558493² = 6173492288862098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55558483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153296 + ... + 153657.

It is an arithmetic number, because the mean of its divisors is an integer number (13966407).

Almost surely, 2^55558493 is an apocalyptic number.

It is an amenable number.

55558493 is a deficient number, since it is larger than the sum of its proper divisors (307135).

55558493 is a wasteful number, since it uses less digits than its factorization.

55558493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307134.

The product of its digits is 540000, while the sum is 44.

The square root of 55558493 is about 7453.7569721584. The cubic root of 55558493 is about 381.5781391349.

The spelling of 55558493 in words is "fifty-five million, five hundred fifty-eight thousand, four hundred ninety-three".