31241243 has 4 divisors (see below), whose sum is σ = 34081368. Its totient is φ = 28401120.

The previous prime is 31241233. The next prime is 31241251. The reversal of 31241243 is 34214213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31241243 - 2⁴ = 31241227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31241233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1420046 + ... + 1420067.

It is an arithmetic number, because the mean of its divisors is an integer number (8520342).

Almost surely, 2^31241243 is an apocalyptic number.

31241243 is a deficient number, since it is larger than the sum of its proper divisors (2840125).

31241243 is a wasteful number, since it uses less digits than its factorization.

31241243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840124.

The product of its digits is 576, while the sum is 20.

The square root of 31241243 is about 5589.3866389793. The cubic root of 31241243 is about 314.9508380487.

Adding to 31241243 its reverse (34214213), we get a palindrome (65455456).

The spelling of 31241243 in words is "thirty-one million, two hundred forty-one thousand, two hundred forty-three".