55821248 has 28 divisors (see below), whose sum is σ = 126595632. Its totient is φ = 23923200.

The previous prime is 55821247. The next prime is 55821263. The reversal of 55821248 is 84212855.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55821247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61853 + ... + 62748.

Almost surely, 2^55821248 is an apocalyptic number.

It is an amenable number.

55821248 is an abundant number, since it is smaller than the sum of its proper divisors (70774384).

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

55821248 is a wasteful number, since it uses less digits than its factorization.

55821248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124620 (or 124610 counting only the distinct ones).

The product of its digits is 25600, while the sum is 35.

The square root of 55821248 is about 7471.3618571182. The cubic root of 55821248 is about 382.1787309047.

The spelling of 55821248 in words is "fifty-five million, eight hundred twenty-one thousand, two hundred forty-eight".