31222245 has 8 divisors (see below), whose sum is σ = 49955616. Its totient is φ = 16651856.

The previous prime is 31222211. The next prime is 31222249. The reversal of 31222245 is 54222213.

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

It is a cyclic number.

It is not a de Polignac number, because 31222245 - 2⁹ = 31221733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222249) 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, 1040727 + ... + 1040756.

It is an arithmetic number, because the mean of its divisors is an integer number (6244452).

Almost surely, 2^31222245 is an apocalyptic number.

It is an amenable number.

31222245 is a deficient number, since it is larger than the sum of its proper divisors (18733371).

31222245 is a wasteful number, since it uses less digits than its factorization.

31222245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081491.

The product of its digits is 960, while the sum is 21.

The square root of 31222245 is about 5587.6869096255. The cubic root of 31222245 is about 314.8869838962.

Adding to 31222245 its reverse (54222213), we get a palindrome (85444458).

The spelling of 31222245 in words is "thirty-one million, two hundred twenty-two thousand, two hundred forty-five".