55243900 has 36 divisors (see below), whose sum is σ = 120313480. Its totient is φ = 22017600.

The previous prime is 55243889. The next prime is 55243901. The reversal of 55243900 is 934255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243901) 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, 32266 + ... + 33934.

Almost surely, 2^55243900 is an apocalyptic number.

55243900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55243900 is an abundant number, since it is smaller than the sum of its proper divisors (65069580).

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

55243900 is a wasteful number, since it uses less digits than its factorization.

55243900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55243900 is about 7432.6240319284. The cubic root of 55243900 is about 380.8565626823.

The spelling of 55243900 in words is "fifty-five million, two hundred forty-three thousand, nine hundred".