31182018213 has 16 divisors (see below), whose sum is σ = 42887839680. Its totient is φ = 20137055616.

The previous prime is 31182018199. The next prime is 31182018221. The reversal of 31182018213 is 31281028113.

It is not a de Polignac number, because 31182018213 - 2⁵ = 31182018181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31182018233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593568 + ... + 643961.

It is an arithmetic number, because the mean of its divisors is an integer number (2680489980).

Almost surely, 2^31182018213 is an apocalyptic number.

It is an amenable number.

31182018213 is a deficient number, since it is larger than the sum of its proper divisors (11705821467).

31182018213 is a wasteful number, since it uses less digits than its factorization.

31182018213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237796.

The product of its (nonzero) digits is 2304, while the sum is 30.

It can be divided in two parts, 311820 and 18213, that added together give a palindrome (330033).

The spelling of 31182018213 in words is "thirty-one billion, one hundred eighty-two million, eighteen thousand, two hundred thirteen".