243213102 has 48 divisors (see below), whose sum is σ = 576605952. Its totient is φ = 73478160.

The previous prime is 243213079. The next prime is 243213119. The reversal of 243213102 is 201312342.

It is a super-2 number, since 2×243213102² = 118305225968924808, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70993 + ... + 74339.

It is an arithmetic number, because the mean of its divisors is an integer number (12012624).

Almost surely, 2^243213102 is an apocalyptic number.

243213102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243213102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288302976).

243213102 is an abundant number, since it is smaller than the sum of its proper divisors (333392850).

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

243213102 is a wasteful number, since it uses less digits than its factorization.

243213102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733 (or 3730 counting only the distinct ones).

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

The square root of 243213102 is about 15595.2910200483. The cubic root of 243213102 is about 624.2075092649.

Adding to 243213102 its reverse (201312342), we get a palindrome (444525444).

The spelling of 243213102 in words is "two hundred forty-three million, two hundred thirteen thousand, one hundred two".