243312102 has 24 divisors (see below), whose sum is σ = 575101800. Its totient is φ = 73730880.

The previous prime is 243312079. The next prime is 243312107. The reversal of 243312102 is 201213342.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243312107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614227 + ... + 614622.

It is an arithmetic number, because the mean of its divisors is an integer number (23962575).

Almost surely, 2^243312102 is an apocalyptic number.

243312102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243312102 is an abundant number, since it is smaller than the sum of its proper divisors (331789698).

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

243312102 is a wasteful number, since it uses less digits than its factorization.

243312102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228868 (or 1228865 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 243312102 is about 15598.4647321459. The cubic root of 243312102 is about 624.2921924228.

Adding to 243312102 its reverse (201213342), we get a palindrome (444525444).

It can be divided in two parts, 2433 and 12102, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 243312102 in words is "two hundred forty-three million, three hundred twelve thousand, one hundred two".