231212442 has 8 divisors (see below), whose sum is σ = 462424896. Its totient is φ = 77070812.

The previous prime is 231212441. The next prime is 231212521. The reversal of 231212442 is 244212132.

It is a sphenic number, since it is the product of 3 distinct primes.

231212442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (231212441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19267698 + ... + 19267709.

It is an arithmetic number, because the mean of its divisors is an integer number (57803112).

Almost surely, 2^231212442 is an apocalyptic number.

231212442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231212442 is a wasteful number, since it uses less digits than its factorization.

231212442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38535412.

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

The square root of 231212442 is about 15205.6713761675. The cubic root of 231212442 is about 613.7672815749.

Adding to 231212442 its reverse (244212132), we get a palindrome (475424574).

The spelling of 231212442 in words is "two hundred thirty-one million, two hundred twelve thousand, four hundred forty-two".