31240331213 has 32 divisors (see below), whose sum is σ = 38666315520. Its totient is φ = 24578703360.

The previous prime is 31240331203. The next prime is 31240331219. The reversal of 31240331213 is 31213304213.

It is a cyclic number.

It is not a de Polignac number, because 31240331213 - 2⁶ = 31240331149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240331219) 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 31 ways as a sum of consecutive naturals, for example, 24812978 + ... + 24814236.

It is an arithmetic number, because the mean of its divisors is an integer number (1208322360).

Almost surely, 2^31240331213 is an apocalyptic number.

It is an amenable number.

31240331213 is a deficient number, since it is larger than the sum of its proper divisors (7425984307).

31240331213 is a wasteful number, since it uses less digits than its factorization.

31240331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31240331213 its reverse (31213304213), we get a palindrome (62453635426).

The spelling of 31240331213 in words is "thirty-one billion, two hundred forty million, three hundred thirty-one thousand, two hundred thirteen".