243123132 has 48 divisors (see below), whose sum is σ = 656552960. Its totient is φ = 68582592.

The previous prime is 243123119. The next prime is 243123143. The reversal of 243123132 is 231321342.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 243123099 and 243123108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11683 + ... + 24954.

Almost surely, 2^243123132 is an apocalyptic number.

It is an amenable number.

243123132 is an abundant number, since it is smaller than the sum of its proper divisors (413429828).

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

243123132 is a wasteful number, since it uses less digits than its factorization.

243123132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36730 (or 36728 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 243123132 is about 15592.4062286743. The cubic root of 243123132 is about 624.1305303035.

Adding to 243123132 its reverse (231321342), we get a palindrome (474444474).

The spelling of 243123132 in words is "two hundred forty-three million, one hundred twenty-three thousand, one hundred thirty-two".