31104231 has 4 divisors (see below), whose sum is σ = 41472312. Its totient is φ = 20736152.

The previous prime is 31104223. The next prime is 31104259. The reversal of 31104231 is 13240113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13240113 = 3 ⋅4413371.

It is a cyclic number.

It is not a de Polignac number, because 31104231 - 2³ = 31104223 is a prime.

It is a super-2 number, since 2×31104231² = 1934946372202722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31104231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31104331) 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, 5184036 + ... + 5184041.

It is an arithmetic number, because the mean of its divisors is an integer number (10368078).

Almost surely, 2^31104231 is an apocalyptic number.

31104231 is a deficient number, since it is larger than the sum of its proper divisors (10368081).

31104231 is a wasteful number, since it uses less digits than its factorization.

31104231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10368080.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31104231 is about 5577.1167282028. The cubic root of 31104231 is about 314.4897458413.

Adding to 31104231 its reverse (13240113), we get a palindrome (44344344).

The spelling of 31104231 in words is "thirty-one million, one hundred four thousand, two hundred thirty-one".