31040340011 has 4 divisors (see below), whose sum is σ = 31146280032. Its totient is φ = 30934399992.

The previous prime is 31040340007. The next prime is 31040340017. The reversal of 31040340011 is 11004304013.

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

It is a cyclic number.

It is not a de Polignac number, because 31040340011 - 2² = 31040340007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31040340017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52969571 + ... + 52970156.

It is an arithmetic number, because the mean of its divisors is an integer number (7786570008).

Almost surely, 2^31040340011 is an apocalyptic number.

31040340011 is a deficient number, since it is larger than the sum of its proper divisors (105940021).

31040340011 is a wasteful number, since it uses less digits than its factorization.

31040340011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105940020.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31040340011 its reverse (11004304013), we get a palindrome (42044644024).

The spelling of 31040340011 in words is "thirty-one billion, forty million, three hundred forty thousand, eleven".