31313002011 has 4 divisors (see below), whose sum is σ = 41750669352. Its totient is φ = 20875334672.

The previous prime is 31313002001. The next prime is 31313002057. The reversal of 31313002011 is 11020031313.

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 31313002011 - 2¹⁸ = 31312739867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31313002001) 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, 5218833666 + ... + 5218833671.

It is an arithmetic number, because the mean of its divisors is an integer number (10437667338).

Almost surely, 2^31313002011 is an apocalyptic number.

31313002011 is a deficient number, since it is larger than the sum of its proper divisors (10437667341).

31313002011 is a wasteful number, since it uses less digits than its factorization.

31313002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10437667340.

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

Adding to 31313002011 its reverse (11020031313), we get a palindrome (42333033324).

The spelling of 31313002011 in words is "thirty-one billion, three hundred thirteen million, two thousand, eleven".