31312320411 has 4 divisors (see below), whose sum is σ = 41749760552. Its totient is φ = 20874880272.

The previous prime is 31312320409. The next prime is 31312320437. The reversal of 31312320411 is 11402321313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31312320411 - 2¹ = 31312320409 is a prime.

It is a super-2 number, since 2×31312320411² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312320491) 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 3 ways as a sum of consecutive naturals, for example, 5218720066 + ... + 5218720071.

It is an arithmetic number, because the mean of its divisors is an integer number (10437440138).

Almost surely, 2^31312320411 is an apocalyptic number.

31312320411 is a deficient number, since it is larger than the sum of its proper divisors (10437440141).

31312320411 is a wasteful number, since it uses less digits than its factorization.

31312320411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437440140.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31312320411 its reverse (11402321313), we get a palindrome (42714641724).

The spelling of 31312320411 in words is "thirty-one billion, three hundred twelve million, three hundred twenty thousand, four hundred eleven".