55300640 has 48 divisors (see below), whose sum is σ = 137531520. Its totient is φ = 20954880.

The previous prime is 55300633. The next prime is 55300649. The reversal of 55300640 is 4600355.

55300640 = T₄₇₅ + T₄₇₆ + ... + T₇₅₉.

It is not an unprimeable number, because it can be changed into a prime (55300649) 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 7 ways as a sum of consecutive naturals, for example, 6056 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (2865240).

Almost surely, 2^55300640 is an apocalyptic number.

It is an amenable number.

55300640 is an abundant number, since it is smaller than the sum of its proper divisors (82230880).

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

55300640 is a wasteful number, since it uses less digits than its factorization.

55300640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18225 (or 18217 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55300640 is about 7436.4400084987. The cubic root of 55300640 is about 380.9869083388.

Adding to 55300640 its reverse (4600355), we get a palindrome (59900995).

The spelling of 55300640 in words is "fifty-five million, three hundred thousand, six hundred forty".