31663085 has 8 divisors (see below), whose sum is σ = 38423160. Its totient is φ = 25045504.

The previous prime is 31663081. The next prime is 31663097. The reversal of 31663085 is 58036613.

It can be written as a sum of positive squares in 4 ways, for example, as 515524 + 31147561 = 718^2 + 5581^2 .

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 31663085 - 2² = 31663081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31663081) 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, 35132 + ... + 36021.

It is an arithmetic number, because the mean of its divisors is an integer number (4802895).

Almost surely, 2^31663085 is an apocalyptic number.

It is an amenable number.

31663085 is a deficient number, since it is larger than the sum of its proper divisors (6760075).

31663085 is an equidigital number, since it uses as much as digits as its factorization.

31663085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71247.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 31663085 is about 5626.9960902777. The cubic root of 31663085 is about 316.3620702965.

Adding to 31663085 its reverse (58036613), we get a palindrome (89699698).

The spelling of 31663085 in words is "thirty-one million, six hundred sixty-three thousand, eighty-five".