55255144 has 48 divisors (see below), whose sum is σ = 124433280. Its totient is φ = 22911840.

The previous prime is 55255133. The next prime is 55255157. The reversal of 55255144 is 44155255.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9879 + ... + 14425.

It is an arithmetic number, because the mean of its divisors is an integer number (2592360).

Almost surely, 2^55255144 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 55255144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62216640).

55255144 is an abundant number, since it is smaller than the sum of its proper divisors (69178136).

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

55255144 is a wasteful number, since it uses less digits than its factorization.

55255144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4598 (or 4587 counting only the distinct ones).

The product of its digits is 20000, while the sum is 31.

The square root of 55255144 is about 7433.3803884908. The cubic root of 55255144 is about 380.8823999885.

It can be divided in two parts, 552 and 55144, that added together give a square (55696 = 236²).

The spelling of 55255144 in words is "fifty-five million, two hundred fifty-five thousand, one hundred forty-four".