31012312311 has 48 divisors (see below), whose sum is σ = 47258300544. Its totient is φ = 19575940032.

The previous prime is 31012312267. The next prime is 31012312337. The reversal of 31012312311 is 11321321013.

31012312311 is a `hidden beast` number, since 31 + 0 + 12 + 312 + 311 = 666.

It is not a de Polignac number, because 31012312311 - 2¹³ = 31012304119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012312391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1843440 + ... + 1860186.

It is an arithmetic number, because the mean of its divisors is an integer number (984547928).

Almost surely, 2^31012312311 is an apocalyptic number.

31012312311 is a deficient number, since it is larger than the sum of its proper divisors (16245988233).

31012312311 is a wasteful number, since it uses less digits than its factorization.

31012312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16940 (or 16937 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31012312311 its reverse (11321321013), we get a palindrome (42333633324).

The spelling of 31012312311 in words is "thirty-one billion, twelve million, three hundred twelve thousand, three hundred eleven".