55643300 has 36 divisors (see below), whose sum is σ = 123325440. Its totient is φ = 21781920.

The previous prime is 55643297. The next prime is 55643303. The reversal of 55643300 is 334655.

It is an interprime number because it is at equal distance from previous prime (55643297) and next prime (55643303).

It is a self number, because there is not a number n which added to its sum of digits gives 55643300.

It is not an unprimeable number, because it can be changed into a prime (55643303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1220 + ... + 10619.

Almost surely, 2^55643300 is an apocalyptic number.

55643300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55643300 is an abundant number, since it is smaller than the sum of its proper divisors (67682140).

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

55643300 is a wasteful number, since it uses less digits than its factorization.

55643300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900 (or 11893 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 55643300 is about 7459.4436789884. The cubic root of 55643300 is about 381.7721931486.

Adding to 55643300 its reverse (334655), we get a palindrome (55977955).

The spelling of 55643300 in words is "fifty-five million, six hundred forty-three thousand, three hundred".