31982011 has 4 divisors (see below), whose sum is σ = 32074000. Its totient is φ = 31890024.

The previous prime is 31981933. The next prime is 31982033. The reversal of 31982011 is 11028913.

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 31982011 - 2¹¹ = 31979963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31982081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45471 + ... + 46168.

It is an arithmetic number, because the mean of its divisors is an integer number (8018500).

Almost surely, 2^31982011 is an apocalyptic number.

31982011 is a deficient number, since it is larger than the sum of its proper divisors (91989).

31982011 is an equidigital number, since it uses as much as digits as its factorization.

31982011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91988.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 31982011 is about 5655.2640079841. The cubic root of 31982011 is about 317.4207080809.

The spelling of 31982011 in words is "thirty-one million, nine hundred eighty-two thousand, eleven".