31344121 has 2 divisors, whose sum is σ = 31344122. Its totient is φ = 31344120.

The previous prime is 31344097. The next prime is 31344139. The reversal of 31344121 is 12144313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25755625 + 5588496 = 5075^2 + 2364^2 .

It is an emirp because it is prime and its reverse (12144313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31344121 - 2⁷ = 31343993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31344151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672060 + 15672061.

It is an arithmetic number, because the mean of its divisors is an integer number (15672061).

Almost surely, 2^31344121 is an apocalyptic number.

It is an amenable number.

31344121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344121 is an equidigital number, since it uses as much as digits as its factorization.

31344121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 31344121 is about 5598.5820526273. The cubic root of 31344121 is about 315.2961722701.

Adding to 31344121 its reverse (12144313), we get a palindrome (43488434).

The spelling of 31344121 in words is "thirty-one million, three hundred forty-four thousand, one hundred twenty-one".