31313231011 has 8 divisors (see below), whose sum is σ = 31878005040. Its totient is φ = 30749591808.

The previous prime is 31313230999. The next prime is 31313231051. The reversal of 31313231011 is 11013231313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31313231011 - 2¹¹ = 31313228963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31313231011.

It is not an unprimeable number, because it can be changed into a prime (31313231051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227926 + ... + 338491.

It is an arithmetic number, because the mean of its divisors is an integer number (3984750630).

Almost surely, 2^31313231011 is an apocalyptic number.

31313231011 is a deficient number, since it is larger than the sum of its proper divisors (564774029).

31313231011 is an equidigital number, since it uses as much as digits as its factorization.

31313231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567413.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31313231011 its reverse (11013231313), we get a palindrome (42326462324).

The spelling of 31313231011 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty-one thousand, eleven".