31104245 has 4 divisors (see below), whose sum is σ = 37325100. Its totient is φ = 24883392.

The previous prime is 31104223. The next prime is 31104259. The reversal of 31104245 is 54240113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15311569 + 15792676 = 3913^2 + 3974^2 .

It is a cyclic number.

It is not a de Polignac number, because 31104245 - 2⁶ = 31104181 is a prime.

It is a congruent number.

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, 3110420 + ... + 3110429.

It is an arithmetic number, because the mean of its divisors is an integer number (9331275).

Almost surely, 2^31104245 is an apocalyptic number.

It is an amenable number.

31104245 is a deficient number, since it is larger than the sum of its proper divisors (6220855).

31104245 is an equidigital number, since it uses as much as digits as its factorization.

31104245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220854.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 31104245 is about 5577.1179833315. The cubic root of 31104245 is about 314.4897930252.

Adding to 31104245 its reverse (54240113), we get a palindrome (85344358).

The spelling of 31104245 in words is "thirty-one million, one hundred four thousand, two hundred forty-five".