55317144 has 64 divisors (see below), whose sum is σ = 144000000. Its totient is φ = 17688960.

The previous prime is 55317131. The next prime is 55317211. The reversal of 55317144 is 44171355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110607 + ... + 111105.

It is an arithmetic number, because the mean of its divisors is an integer number (2250000).

Almost surely, 2^55317144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55317144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72000000).

55317144 is an abundant number, since it is smaller than the sum of its proper divisors (88682856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55317144 is a wasteful number, since it uses less digits than its factorization.

55317144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 684 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 55317144 is about 7437.5495964733. The cubic root of 55317144 is about 381.0248053235.

Adding to 55317144 its reverse (44171355), we get a palindrome (99488499).

The spelling of 55317144 in words is "fifty-five million, three hundred seventeen thousand, one hundred forty-four".