231440044 has 12 divisors (see below), whose sum is σ = 441840168. Its totient is φ = 105200000.

The previous prime is 231440009. The next prime is 231440051. The reversal of 231440044 is 440044132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 231439997 and 231440024.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2629957 + ... + 2630044.

It is an arithmetic number, because the mean of its divisors is an integer number (36820014).

Almost surely, 2^231440044 is an apocalyptic number.

It is an amenable number.

231440044 is a deficient number, since it is larger than the sum of its proper divisors (210400124).

231440044 is a wasteful number, since it uses less digits than its factorization.

231440044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260016 (or 5260014 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 231440044 is about 15213.1536507064. The cubic root of 231440044 is about 613.9686099101.

Adding to 231440044 its reverse (440044132), we get a palindrome (671484176).

The spelling of 231440044 in words is "two hundred thirty-one million, four hundred forty thousand, forty-four".