55280393 has 8 divisors (see below), whose sum is σ = 63261120. Its totient is φ = 47320560.

The previous prime is 55280389. The next prime is 55280399. The reversal of 55280393 is 39308255.

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

It is not a de Polignac number, because 55280393 - 2² = 55280389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55280399) 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 7 ways as a sum of consecutive naturals, for example, 938 + ... + 10556.

It is an arithmetic number, because the mean of its divisors is an integer number (7907640).

Almost surely, 2^55280393 is an apocalyptic number.

It is an amenable number.

55280393 is a deficient number, since it is larger than the sum of its proper divisors (7980727).

55280393 is an equidigital number, since it uses as much as digits as its factorization.

55280393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10447.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55280393 is about 7435.0785469960. The cubic root of 55280393 is about 380.9404062637.

The spelling of 55280393 in words is "fifty-five million, two hundred eighty thousand, three hundred ninety-three".