31852009 has 8 divisors (see below), whose sum is σ = 37145600. Its totient is φ = 27301428.

The previous prime is 31851991. The next prime is 31852019. The reversal of 31852009 is 90025813.

It is not a de Polignac number, because 31852009 - 2⁵ = 31851977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31852019) 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, 46089 + ... + 46774.

It is an arithmetic number, because the mean of its divisors is an integer number (4643200).

Almost surely, 2^31852009 is an apocalyptic number.

It is an amenable number.

31852009 is a deficient number, since it is larger than the sum of its proper divisors (5293591).

31852009 is an frugal number, since it uses more digits than its factorization.

31852009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92884 (or 92870 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 31852009 is about 5643.7584108464. The cubic root of 31852009 is about 316.9900350803.

The spelling of 31852009 in words is "thirty-one million, eight hundred fifty-two thousand, nine".