231244442 has 32 divisors (see below), whose sum is σ = 408481920. Its totient is φ = 96793920.

The previous prime is 231244427. The next prime is 231244451. The reversal of 231244442 is 244442132.

It is a happy number.

231244442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 174659 + ... + 175977.

It is an arithmetic number, because the mean of its divisors is an integer number (12765060).

Almost surely, 2^231244442 is an apocalyptic number.

231244442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231244442 is a deficient number, since it is larger than the sum of its proper divisors (177237478).

231244442 is a wasteful number, since it uses less digits than its factorization.

231244442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958.

The product of its digits is 6144, while the sum is 26.

The square root of 231244442 is about 15206.7235787332. The cubic root of 231244442 is about 613.7955955745.

Adding to 231244442 its reverse (244442132), we get a palindrome (475686574).

The spelling of 231244442 in words is "two hundred thirty-one million, two hundred forty-four thousand, four hundred forty-two".