31082011 has 4 divisors (see below), whose sum is σ = 31211224. Its totient is φ = 30952800.

The previous prime is 31081987. The next prime is 31082017. The reversal of 31082011 is 11028013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31082011 - 2⁵ = 31081979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31082017) 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 3 ways as a sum of consecutive naturals, for example, 64245 + ... + 64726.

It is an arithmetic number, because the mean of its divisors is an integer number (7802806).

Almost surely, 2^31082011 is an apocalyptic number.

31082011 is a deficient number, since it is larger than the sum of its proper divisors (129213).

31082011 is a wasteful number, since it uses less digits than its factorization.

31082011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129212.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 31082011 is about 5575.1243035470. The cubic root of 31082011 is about 314.4148404175.

The spelling of 31082011 in words is "thirty-one million, eighty-two thousand, eleven".