31244141 has 2 divisors, whose sum is σ = 31244142. Its totient is φ = 31244140.

The previous prime is 31244119. The next prime is 31244153. The reversal of 31244141 is 14144213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 11628100 = 4429^2 + 3410^2 .

It is an emirp because it is prime and its reverse (14144213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31244141 - 2⁶ = 31244077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31244441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622070 + 15622071.

It is an arithmetic number, because the mean of its divisors is an integer number (15622071).

Almost surely, 2^31244141 is an apocalyptic number.

It is an amenable number.

31244141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31244141 is an equidigital number, since it uses as much as digits as its factorization.

31244141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 31244141 is about 5589.6458742929. The cubic root of 31244141 is about 314.9605762369.

Adding to 31244141 its reverse (14144213), we get a palindrome (45388354).

The spelling of 31244141 in words is "thirty-one million, two hundred forty-four thousand, one hundred forty-one".