243051900 has 288 divisors, whose sum is σ = 898275840. Its totient is φ = 49351680.

The previous prime is 243051883. The next prime is 243051901. The reversal of 243051900 is 9150342.

It is a super-2 number, since 2×243051900² = 118148452187220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243051901) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 791547 + ... + 791853.

Almost surely, 2^243051900 is an apocalyptic number.

243051900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243051900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449137920).

243051900 is an abundant number, since it is smaller than the sum of its proper divisors (655223940).

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

243051900 is a wasteful number, since it uses less digits than its factorization.

243051900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 243051900 is about 15590.1218725191. The cubic root of 243051900 is about 624.0695702347.

It can be divided in two parts, 243051 and 900, that added together give a triangular number (243951 = T₆₉₈).

The spelling of 243051900 in words is "two hundred forty-three million, fifty-one thousand, nine hundred".