10311343981 has 2 divisors, whose sum is σ = 10311343982. Its totient is φ = 10311343980.

The previous prime is 10311343967. The next prime is 10311344011. The reversal of 10311343981 is 18934311301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6916417225 + 3394926756 = 83165^2 + 58266^2 .

It is a cyclic number.

It is not a de Polignac number, because 10311343981 - 2¹³ = 10311335789 is a prime.

It is a super-2 number, since 2×10311343981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10311313981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5155671990 + 5155671991.

It is an arithmetic number, because the mean of its divisors is an integer number (5155671991).

Almost surely, 2^10311343981 is an apocalyptic number.

It is an amenable number.

10311343981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10311343981 is an equidigital number, since it uses as much as digits as its factorization.

10311343981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 10311343981 in words is "ten billion, three hundred eleven million, three hundred forty-three thousand, nine hundred eighty-one".