31104243 has 14 divisors (see below), whose sum is σ = 46636124. Its totient is φ = 20735676.

The previous prime is 31104223. The next prime is 31104259. The reversal of 31104243 is 34240113.

It is not a de Polignac number, because 31104243 - 2¹⁸ = 30842099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31104223) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 20605 + ... + 22062.

Almost surely, 2^31104243 is an apocalyptic number.

31104243 is a deficient number, since it is larger than the sum of its proper divisors (15531881).

31104243 is an frugal number, since it uses more digits than its factorization.

31104243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42685 (or 42670 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31104243 is about 5577.1178040275. The cubic root of 31104243 is about 314.4897862846.

Adding to 31104243 its reverse (34240113), we get a palindrome (65344356).

The spelling of 31104243 in words is "thirty-one million, one hundred four thousand, two hundred forty-three".