31000241 has 2 divisors, whose sum is σ = 31000242. Its totient is φ = 31000240.

The previous prime is 31000237. The next prime is 31000243. The reversal of 31000241 is 14200013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 5193841 = 5080^2 + 2279^2 .

It is a cyclic number.

It is not a de Polignac number, because 31000241 - 2² = 31000237 is a prime.

It is a super-2 number, since 2×31000241² = 1922029884116162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 31000243, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31000243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500120 + 15500121.

It is an arithmetic number, because the mean of its divisors is an integer number (15500121).

Almost surely, 2^31000241 is an apocalyptic number.

It is an amenable number.

31000241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000241 is an equidigital number, since it uses as much as digits as its factorization.

31000241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 31000241 is about 5567.7860052269. The cubic root of 31000241 is about 314.1388792937.

Adding to 31000241 its reverse (14200013), we get a palindrome (45200254).

The spelling of 31000241 in words is "thirty-one million, two hundred forty-one", and thus it is an aban number.