55320500 has 24 divisors (see below), whose sum is σ = 120821064. Its totient is φ = 22128000.

The previous prime is 55320481. The next prime is 55320541. The reversal of 55320500 is 502355.

It can be written as a sum of positive squares in 4 ways, for example, as 3076516 + 52243984 = 1754^2 + 7228^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 54821 + ... + 55820.

It is an arithmetic number, because the mean of its divisors is an integer number (5034211).

Almost surely, 2^55320500 is an apocalyptic number.

55320500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55320500 is an abundant number, since it is smaller than the sum of its proper divisors (65500564).

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

55320500 is a wasteful number, since it uses less digits than its factorization.

55320500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110660 (or 110648 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 55320500 is about 7437.7752049924. The cubic root of 55320500 is about 381.0325105501.

Adding to 55320500 its reverse (502355), we get a palindrome (55822855).

The spelling of 55320500 in words is "fifty-five million, three hundred twenty thousand, five hundred".