55331304 has 128 divisors (see below), whose sum is σ = 168134400. Its totient is φ = 14837760.

The previous prime is 55331303. The next prime is 55331327. The reversal of 55331304 is 40313355.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (55331303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199614 + ... + 199890.

It is an arithmetic number, because the mean of its divisors is an integer number (1313550).

Almost surely, 2^55331304 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 55331304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84067200).

55331304 is an abundant number, since it is smaller than the sum of its proper divisors (112803096).

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

55331304 is a wasteful number, since it uses less digits than its factorization.

55331304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 55331304 is about 7438.5014619882. The cubic root of 55331304 is about 381.0573139369.

Adding to 55331304 its reverse (40313355), we get a palindrome (95644659).

The spelling of 55331304 in words is "fifty-five million, three hundred thirty-one thousand, three hundred four".