311031013 has 2 divisors, whose sum is σ = 311031014. Its totient is φ = 311031012.

The previous prime is 311030999. The next prime is 311031023. The reversal of 311031013 is 310130113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173132964 + 137898049 = 13158^2 + 11743^2 .

It is an emirp because it is prime and its reverse (310130113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311031013 - 2¹³ = 311022821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311030984 and 311031002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311031023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155515506 + 155515507.

It is an arithmetic number, because the mean of its divisors is an integer number (155515507).

Almost surely, 2^311031013 is an apocalyptic number.

It is an amenable number.

311031013 is a deficient number, since it is larger than the sum of its proper divisors (1).

311031013 is an equidigital number, since it uses as much as digits as its factorization.

311031013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 311031013 is about 17636.0713595744. The cubic root of 311031013 is about 677.5394151985.

Adding to 311031013 its reverse (310130113), we get a palindrome (621161126).

The spelling of 311031013 in words is "three hundred eleven million, thirty-one thousand, thirteen".