243145020 has 48 divisors (see below), whose sum is σ = 681518880. Its totient is φ = 64770816.

The previous prime is 243145009. The next prime is 243145027. The reversal of 243145020 is 20541342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243145027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85786 + ... + 88574.

It is an arithmetic number, because the mean of its divisors is an integer number (14198310).

Almost surely, 2^243145020 is an apocalyptic number.

243145020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243145020 is an abundant number, since it is smaller than the sum of its proper divisors (438373860).

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

243145020 is a wasteful number, since it uses less digits than its factorization.

243145020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254 (or 4252 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 243145020 is about 15593.1080930006. The cubic root of 243145020 is about 624.1492595773.

Adding to 243145020 its reverse (20541342), we get a palindrome (263686362).

The spelling of 243145020 in words is "two hundred forty-three million, one hundred forty-five thousand, twenty".