31664361 has 8 divisors (see below), whose sum is σ = 43581184. Its totient is φ = 20428560.

The previous prime is 31664359. The next prime is 31664377. The reversal of 31664361 is 16346613.

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

It is not a de Polignac number, because 31664361 - 2¹ = 31664359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31664351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170146 + ... + 170331.

It is an arithmetic number, because the mean of its divisors is an integer number (5447648).

Almost surely, 2^31664361 is an apocalyptic number.

31664361 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31664361 is a deficient number, since it is larger than the sum of its proper divisors (11916823).

31664361 is a wasteful number, since it uses less digits than its factorization.

31664361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340511.

The product of its digits is 7776, while the sum is 30.

The square root of 31664361 is about 5627.1094711228. The cubic root of 31664361 is about 316.3663199622.

The spelling of 31664361 in words is "thirty-one million, six hundred sixty-four thousand, three hundred sixty-one".