55621344 has 48 divisors (see below), whose sum is σ = 146627712. Its totient is φ = 18461568.

The previous prime is 55621277. The next prime is 55621367. The reversal of 55621344 is 44312655.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24147 + ... + 26349.

It is an arithmetic number, because the mean of its divisors is an integer number (3054744).

Almost surely, 2^55621344 is an apocalyptic number.

It is an amenable number.

55621344 is an abundant number, since it is smaller than the sum of its proper divisors (91006368).

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

55621344 is a wasteful number, since it uses less digits than its factorization.

55621344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2471 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 55621344 is about 7457.9718422638. The cubic root of 55621344 is about 381.7219727087.

Adding to 55621344 its reverse (44312655), we get a palindrome (99933999).

The spelling of 55621344 in words is "fifty-five million, six hundred twenty-one thousand, three hundred forty-four".