55457244 has 48 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 18309168.

The previous prime is 55457231. The next prime is 55457249. The reversal of 55457244 is 44275455.

It is a happy number.

55457244 is a `hidden beast` number, since 5 + 545 + 72 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55457199 and 55457208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55457249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9157 + ... + 13955.

It is an arithmetic number, because the mean of its divisors is an integer number (3024000).

Almost surely, 2^55457244 is an apocalyptic number.

55457244 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55457244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72576000).

55457244 is an abundant number, since it is smaller than the sum of its proper divisors (89694756).

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

55457244 is a wasteful number, since it uses less digits than its factorization.

55457244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919 (or 4911 counting only the distinct ones).

The product of its digits is 112000, while the sum is 36.

The square root of 55457244 is about 7446.9620651646. The cubic root of 55457244 is about 381.3462040119.

The spelling of 55457244 in words is "fifty-five million, four hundred fifty-seven thousand, two hundred forty-four".