55821348 has 72 divisors (see below), whose sum is σ = 156121056. Its totient is φ = 16675200.

The previous prime is 55821347. The next prime is 55821379. The reversal of 55821348 is 84312855.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (55821341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27943 + ... + 29873.

It is an arithmetic number, because the mean of its divisors is an integer number (2168348).

Almost surely, 2^55821348 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 55821348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78060528).

55821348 is an abundant number, since it is smaller than the sum of its proper divisors (100299708).

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

55821348 is a wasteful number, since it uses less digits than its factorization.

55821348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025 (or 2020 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 55821348 is about 7471.3685493355. The cubic root of 55821348 is about 382.1789591204.

It can be divided in two parts, 55821 and 348, that added together give a square (56169 = 237²).

The spelling of 55821348 in words is "fifty-five million, eight hundred twenty-one thousand, three hundred forty-eight".