243212142 has 16 divisors (see below), whose sum is σ = 488973312. Its totient is φ = 80645880.

The previous prime is 243212117. The next prime is 243212159. The reversal of 243212142 is 241212342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104968 + ... + 107259.

It is an arithmetic number, because the mean of its divisors is an integer number (30560832).

Almost surely, 2^243212142 is an apocalyptic number.

243212142 is an abundant number, since it is smaller than the sum of its proper divisors (245761170).

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

243212142 is a wasteful number, since it uses less digits than its factorization.

243212142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212423.

The product of its digits is 768, while the sum is 21.

The square root of 243212142 is about 15595.2602414965. The cubic root of 243212142 is about 624.2066879824.

Adding to 243212142 its reverse (241212342), we get a palindrome (484424484).

The spelling of 243212142 in words is "two hundred forty-three million, two hundred twelve thousand, one hundred forty-two".