55650321 has 10 divisors (see below), whose sum is σ = 83132082. Its totient is φ = 37100160.

The previous prime is 55650313. The next prime is 55650337. The reversal of 55650321 is 12305655.

55650321 is a `hidden beast` number, since 5 + 5 + 650 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54464400 + 1185921 = 7380^2 + 1089^2 .

It is not a de Polignac number, because 55650321 - 2³ = 55650313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55650341) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 343440 + ... + 343601.

Almost surely, 2^55650321 is an apocalyptic number.

It is an amenable number.

55650321 is a deficient number, since it is larger than the sum of its proper divisors (27481761).

55650321 is an equidigital number, since it uses as much as digits as its factorization.

55650321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687053 (or 687044 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55650321 is about 7459.9142756469. The cubic root of 55650321 is about 381.7882496480.

Adding to 55650321 its reverse (12305655), we get a palindrome (67955976).

The spelling of 55650321 in words is "fifty-five million, six hundred fifty thousand, three hundred twenty-one".