55023144 has 128 divisors (see below), whose sum is σ = 158906880. Its totient is φ = 15724800.

The previous prime is 55023139. The next prime is 55023149. The reversal of 55023144 is 44132055.

It is an interprime number because it is at equal distance from previous prime (55023139) and next prime (55023149).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (55023149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419959 + ... + 420089.

It is an arithmetic number, because the mean of its divisors is an integer number (1241460).

Almost surely, 2^55023144 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 55023144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79453440).

55023144 is an abundant number, since it is smaller than the sum of its proper divisors (103883736).

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

55023144 is a wasteful number, since it uses less digits than its factorization.

55023144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55023144 is about 7417.7586911411. The cubic root of 55023144 is about 380.3485813422.

Adding to 55023144 its reverse (44132055), we get a palindrome (99155199).

It can be divided in two parts, 5502 and 3144, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 55023144 in words is "fifty-five million, twenty-three thousand, one hundred forty-four".