31223241 has 36 divisors (see below), whose sum is σ = 53058564. Its totient is φ = 17640000.

The previous prime is 31223239. The next prime is 31223243. The reversal of 31223241 is 14232213.

It is an interprime number because it is at equal distance from previous prime (31223239) and next prime (31223243).

It can be written as a sum of positive squares in 2 ways, for example, as 28676025 + 2547216 = 5355^2 + 1596^2 .

It is not a de Polignac number, because 31223241 - 2¹ = 31223239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31223243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44191 + ... + 44891.

It is an arithmetic number, because the mean of its divisors is an integer number (1473849).

Almost surely, 2^31223241 is an apocalyptic number.

It is an amenable number.

31223241 is a deficient number, since it is larger than the sum of its proper divisors (21835323).

31223241 is a wasteful number, since it uses less digits than its factorization.

31223241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 812 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 31223241 is about 5587.7760334502. The cubic root of 31223241 is about 314.8903321938.

Adding to 31223241 its reverse (14232213), we get a palindrome (45455454).

The spelling of 31223241 in words is "thirty-one million, two hundred twenty-three thousand, two hundred forty-one".