31343105 has 4 divisors (see below), whose sum is σ = 37611732. Its totient is φ = 25074480.

The previous prime is 31343083. The next prime is 31343119. The reversal of 31343105 is 50134313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50134313 = 239 ⋅209767.

It can be written as a sum of positive squares in 2 ways, for example, as 10394176 + 20948929 = 3224^2 + 4577^2 .

It is not a de Polignac number, because 31343105 - 2²⁰ = 30294529 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134306 + ... + 3134315.

It is an arithmetic number, because the mean of its divisors is an integer number (9402933).

Almost surely, 2^31343105 is an apocalyptic number.

It is an amenable number.

31343105 is a deficient number, since it is larger than the sum of its proper divisors (6268627).

31343105 is an equidigital number, since it uses as much as digits as its factorization.

31343105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268626.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 31343105 is about 5598.4913146311. The cubic root of 31343105 is about 315.2927655241.

Adding to 31343105 its reverse (50134313), we get a palindrome (81477418).

The spelling of 31343105 in words is "thirty-one million, three hundred forty-three thousand, one hundred five".