55519744 has 60 divisors (see below), whose sum is σ = 129100554. Its totient is φ = 23783424.

The previous prime is 55519741. The next prime is 55519757. The reversal of 55519744 is 44791555.

It can be written as a sum of positive squares in only one way, i.e., 30118144 + 25401600 = 5488^2 + 5040^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 55519697 and 55519706.

It is not an unprimeable number, because it can be changed into a prime (55519741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23982 + ... + 26194.

Almost surely, 2^55519744 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 55519744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64550277).

55519744 is an abundant number, since it is smaller than the sum of its proper divisors (73580810).

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

55519744 is an equidigital number, since it uses as much as digits as its factorization.

55519744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245 (or 2222 counting only the distinct ones).

The product of its digits is 126000, while the sum is 40.

The square root of 55519744 is about 7451.1572255590. The cubic root of 55519744 is about 381.4894085660.

The spelling of 55519744 in words is "fifty-five million, five hundred nineteen thousand, seven hundred forty-four".