243241020 has 72 divisors (see below), whose sum is σ = 804913200. Its totient is φ = 58967040.

The previous prime is 243241003. The next prime is 243241051. The reversal of 243241020 is 20142342.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 243240984 and 243241002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59445 + ... + 63404.

It is an arithmetic number, because the mean of its divisors is an integer number (11179350).

Almost surely, 2^243241020 is an apocalyptic number.

243241020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243241020 is an abundant number, since it is smaller than the sum of its proper divisors (561672180).

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

243241020 is a wasteful number, since it uses less digits than its factorization.

243241020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122875 (or 122870 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 243241020 is about 15596.1860722421. The cubic root of 243241020 is about 624.2313922415.

Adding to 243241020 its reverse (20142342), we get a palindrome (263383362).

The spelling of 243241020 in words is "two hundred forty-three million, two hundred forty-one thousand, twenty".