31124245 has 8 divisors (see below), whose sum is σ = 37379160. Its totient is φ = 24879360.

The previous prime is 31124243. The next prime is 31124273. The reversal of 31124245 is 54242113.

It can be written as a sum of positive squares in 4 ways, for example, as 11992369 + 19131876 = 3463^2 + 4374^2 .

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

It is not a de Polignac number, because 31124245 - 2¹ = 31124243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31124243) 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, 10041 + ... + 12769.

It is an arithmetic number, because the mean of its divisors is an integer number (4672395).

Almost surely, 2^31124245 is an apocalyptic number.

It is an amenable number.

31124245 is a deficient number, since it is larger than the sum of its proper divisors (6254915).

31124245 is a wasteful number, since it uses less digits than its factorization.

31124245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015.

The product of its digits is 960, while the sum is 22.

The square root of 31124245 is about 5578.9107359771. The cubic root of 31124245 is about 314.5571841292.

Adding to 31124245 its reverse (54242113), we get a palindrome (85366358).

The spelling of 31124245 in words is "thirty-one million, one hundred twenty-four thousand, two hundred forty-five".