313131011 has 4 divisors (see below), whose sum is σ = 313231800. Its totient is φ = 313030224.

The previous prime is 313130989. The next prime is 313131017. The reversal of 313131011 is 110131313.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313131011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313131017) 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, 45581 + ... + 51998.

It is an arithmetic number, because the mean of its divisors is an integer number (78307950).

Almost surely, 2^313131011 is an apocalyptic number.

313131011 is a deficient number, since it is larger than the sum of its proper divisors (100789).

313131011 is an equidigital number, since it uses as much as digits as its factorization.

313131011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100788.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 313131011 is about 17695.5082153636. The cubic root of 313131011 is about 679.0608510285.

Adding to 313131011 its reverse (110131313), we get a palindrome (423262324).

The spelling of 313131011 in words is "three hundred thirteen million, one hundred thirty-one thousand, eleven".