231133442 has 16 divisors (see below), whose sum is σ = 368496960. Its totient is φ = 108419472.

The previous prime is 231133429. The next prime is 231133447. The reversal of 231133442 is 244331132.

It is not an unprimeable number, because it can be changed into a prime (231133447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25613 + ... + 33440.

It is an arithmetic number, because the mean of its divisors is an integer number (23031060).

Almost surely, 2^231133442 is an apocalyptic number.

231133442 is a deficient number, since it is larger than the sum of its proper divisors (137363518).

231133442 is a wasteful number, since it uses less digits than its factorization.

231133442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59177.

The product of its digits is 1728, while the sum is 23.

The square root of 231133442 is about 15203.0734392754. The cubic root of 231133442 is about 613.6973702007.

Adding to 231133442 its reverse (244331132), we get a palindrome (475464574).

It can be divided in two parts, 2311 and 33442, that added together give a palindrome (35753).

The spelling of 231133442 in words is "two hundred thirty-one million, one hundred thirty-three thousand, four hundred forty-two".