55561838 has 8 divisors (see below), whose sum is σ = 83442360. Its totient is φ = 27747720.

The previous prime is 55561837. The next prime is 55561841. The reversal of 55561838 is 83816555.

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

It is a junction number, because it is equal to n+sod(n) for n = 55561795 and 55561804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561837) 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 3 ways as a sum of consecutive naturals, for example, 14453 + ... + 17888.

It is an arithmetic number, because the mean of its divisors is an integer number (10430295).

Almost surely, 2^55561838 is an apocalyptic number.

55561838 is a deficient number, since it is larger than the sum of its proper divisors (27880522).

55561838 is a wasteful number, since it uses less digits than its factorization.

55561838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33202.

The product of its digits is 144000, while the sum is 41.

The square root of 55561838 is about 7453.9813522707. The cubic root of 55561838 is about 381.5857968496.

The spelling of 55561838 in words is "fifty-five million, five hundred sixty-one thousand, eight hundred thirty-eight".