31340243 has 8 divisors (see below), whose sum is σ = 34245120. Its totient is φ = 28444680.

The previous prime is 31340233. The next prime is 31340273. The reversal of 31340243 is 34204313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31340243 - 2⁴ = 31340227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31340203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6038 + ... + 9956.

It is an arithmetic number, because the mean of its divisors is an integer number (4280640).

Almost surely, 2^31340243 is an apocalyptic number.

31340243 is a deficient number, since it is larger than the sum of its proper divisors (2904877).

31340243 is a wasteful number, since it uses less digits than its factorization.

31340243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31340243 is about 5598.2357042197. The cubic root of 31340243 is about 315.2831685664.

Adding to 31340243 its reverse (34204313), we get a palindrome (65544556).

The spelling of 31340243 in words is "thirty-one million, three hundred forty thousand, two hundred forty-three".