31000311213 has 16 divisors (see below), whose sum is σ = 44685136320. Its totient is φ = 19049976576.

The previous prime is 31000311179. The next prime is 31000311229. The reversal of 31000311213 is 31211300013.

It is not a de Polignac number, because 31000311213 - 2⁶ = 31000311149 is a prime.

It is a super-2 number, since 2×31000311213² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000311192 and 31000311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000311263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7347420 + ... + 7351637.

It is an arithmetic number, because the mean of its divisors is an integer number (2792821020).

Almost surely, 2^31000311213 is an apocalyptic number.

It is an amenable number.

31000311213 is a deficient number, since it is larger than the sum of its proper divisors (13684825107).

31000311213 is a wasteful number, since it uses less digits than its factorization.

31000311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14699116.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31000311213 its reverse (31211300013), we get a palindrome (62211611226).

The spelling of 31000311213 in words is "thirty-one billion, three hundred eleven thousand, two hundred thirteen".