31343401 has 2 divisors, whose sum is σ = 31343402. Its totient is φ = 31343400.

The previous prime is 31343399. The next prime is 31343413. The reversal of 31343401 is 10434313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26163225 + 5180176 = 5115^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 31343401 - 2¹ = 31343399 is a prime.

Together with 31343399, it forms a pair of twin primes.

It is a zygodrome in base 13.

It is not a weakly prime, because it can be changed into another prime (31343441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671700 + 15671701.

It is an arithmetic number, because the mean of its divisors is an integer number (15671701).

Almost surely, 2^31343401 is an apocalyptic number.

It is an amenable number.

31343401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31343401 is an equidigital number, since it uses as much as digits as its factorization.

31343401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 31343401 is about 5598.5177502621. The cubic root of 31343401 is about 315.2937580483.

Adding to 31343401 its reverse (10434313), we get a palindrome (41777714).

The spelling of 31343401 in words is "thirty-one million, three hundred forty-three thousand, four hundred one".