55289381 has 8 divisors (see below), whose sum is σ = 63898560. Its totient is φ = 46857888.

The previous prime is 55289329. The next prime is 55289387. The reversal of 55289381 is 18398255.

55289381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55289381 - 2⁶ = 55289317 is a prime.

It is a super-2 number, since 2×55289381² = 6113831302726322, 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 (55289387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43751 + ... + 44996.

It is an arithmetic number, because the mean of its divisors is an integer number (7987320).

Almost surely, 2^55289381 is an apocalyptic number.

It is an amenable number.

55289381 is a deficient number, since it is larger than the sum of its proper divisors (8609179).

55289381 is an equidigital number, since it uses as much as digits as its factorization.

55289381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88843.

The product of its digits is 86400, while the sum is 41.

The square root of 55289381 is about 7435.6829545106. The cubic root of 55289381 is about 380.9610507553.

The spelling of 55289381 in words is "fifty-five million, two hundred eighty-nine thousand, three hundred eighty-one".