231422644 has 12 divisors (see below), whose sum is σ = 408574404. Its totient is φ = 114687104.

The previous prime is 231422627. The next prime is 231422647. The reversal of 231422644 is 446224132.

It can be written as a sum of positive squares in 2 ways, for example, as 45427600 + 185995044 = 6740^2 + 13638^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231422647) 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, 255547 + ... + 256450.

It is an arithmetic number, because the mean of its divisors is an integer number (34047867).

Almost surely, 2^231422644 is an apocalyptic number.

It is an amenable number.

231422644 is a deficient number, since it is larger than the sum of its proper divisors (177151760).

231422644 is a wasteful number, since it uses less digits than its factorization.

231422644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512114 (or 512112 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 231422644 is about 15212.5817664195. The cubic root of 231422644 is about 613.9532231727.

Adding to 231422644 its reverse (446224132), we get a palindrome (677646776).

The spelling of 231422644 in words is "two hundred thirty-one million, four hundred twenty-two thousand, six hundred forty-four".