55284717 has 4 divisors (see below), whose sum is σ = 73712960. Its totient is φ = 36856476.

The previous prime is 55284707. The next prime is 55284767. The reversal of 55284717 is 71748255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55284717 - 2⁷ = 55284589 is a prime.

It is a super-4 number, since 4×55284717⁴ (a number of 32 digits) contains 4444 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 (55284707) 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, 9214117 + ... + 9214122.

It is an arithmetic number, because the mean of its divisors is an integer number (18428240).

Almost surely, 2^55284717 is an apocalyptic number.

It is an amenable number.

55284717 is a deficient number, since it is larger than the sum of its proper divisors (18428243).

55284717 is a wasteful number, since it uses less digits than its factorization.

55284717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428242.

The product of its digits is 78400, while the sum is 39.

The square root of 55284717 is about 7435.3693250571. The cubic root of 55284717 is about 380.9503383167.

The spelling of 55284717 in words is "fifty-five million, two hundred eighty-four thousand, seven hundred seventeen".