31330245 has 8 divisors (see below), whose sum is σ = 50128416. Its totient is φ = 16709456.

The previous prime is 31330223. The next prime is 31330249. The reversal of 31330245 is 54203313.

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 31330245 - 2⁸ = 31329989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330249) 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, 1044327 + ... + 1044356.

It is an arithmetic number, because the mean of its divisors is an integer number (6266052).

Almost surely, 2^31330245 is an apocalyptic number.

It is an amenable number.

31330245 is a deficient number, since it is larger than the sum of its proper divisors (18798171).

31330245 is a wasteful number, since it uses less digits than its factorization.

31330245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088691.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 31330245 is about 5597.3426730905. The cubic root of 31330245 is about 315.2496383395.

Adding to 31330245 its reverse (54203313), we get a palindrome (85533558).

The spelling of 31330245 in words is "thirty-one million, three hundred thirty thousand, two hundred forty-five".