55284391 has 8 divisors (see below), whose sum is σ = 59243184. Its totient is φ = 51404160.

The previous prime is 55284379. The next prime is 55284407. The reversal of 55284391 is 19348255.

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 55284391 - 2⁷ = 55284263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55284391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55284311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18180 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (7405398).

Almost surely, 2^55284391 is an apocalyptic number.

55284391 is a deficient number, since it is larger than the sum of its proper divisors (3958793).

55284391 is a wasteful number, since it uses less digits than its factorization.

55284391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39281.

The product of its digits is 43200, while the sum is 37.

The square root of 55284391 is about 7435.3474027782. The cubic root of 55284391 is about 380.9495895259.

The spelling of 55284391 in words is "fifty-five million, two hundred eighty-four thousand, three hundred ninety-one".