55313500 has 96 divisors (see below), whose sum is σ = 134447040. Its totient is φ = 19712000.

The previous prime is 55313491. The next prime is 55313507. The reversal of 55313500 is 531355.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55313507) 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, 489444 + ... + 489556.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^55313500 is an apocalyptic number.

55313500 is a gapful number since it is divisible by the number (50) 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 55313500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67223520).

55313500 is an abundant number, since it is smaller than the sum of its proper divisors (79133540).

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

55313500 is a wasteful number, since it uses less digits than its factorization.

55313500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 22.

The square root of 55313500 is about 7437.3046192824. The cubic root of 55313500 is about 381.0164385088.

Adding to 55313500 its reverse (531355), we get a palindrome (55844855).

The spelling of 55313500 in words is "fifty-five million, three hundred thirteen thousand, five hundred".