55057344 has 56 divisors (see below), whose sum is σ = 146791680. Its totient is φ = 18211584.

The previous prime is 55057309. The next prime is 55057349. The reversal of 55057344 is 44375055.

It is a super-2 number, since 2×55057344² = 6062622256668672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55057349) 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, 25657 + ... + 27719.

It is an arithmetic number, because the mean of its divisors is an integer number (2621280).

Almost surely, 2^55057344 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 55057344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73395840).

55057344 is an abundant number, since it is smaller than the sum of its proper divisors (91734336).

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

55057344 is a wasteful number, since it uses less digits than its factorization.

55057344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2207 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 33.

The square root of 55057344 is about 7420.0636115872. The cubic root of 55057344 is about 380.4273677486.

The spelling of 55057344 in words is "fifty-five million, fifty-seven thousand, three hundred forty-four".