313164179981 has 2 divisors, whose sum is σ = 313164179982. Its totient is φ = 313164179980.

The previous prime is 313164179969. The next prime is 313164180019. The reversal of 313164179981 is 189971461313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238501349956 + 74662830025 = 488366^2 + 273245^2 .

It is an emirp because it is prime and its reverse (189971461313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313164179981 - 2⁶ = 313164179917 is a prime.

It is a super-2 number, since 2×313164179981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313164179941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156582089990 + 156582089991.

It is an arithmetic number, because the mean of its divisors is an integer number (156582089991).

Almost surely, 2^313164179981 is an apocalyptic number.

It is an amenable number.

313164179981 is a deficient number, since it is larger than the sum of its proper divisors (1).

313164179981 is an equidigital number, since it uses as much as digits as its factorization.

313164179981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The spelling of 313164179981 in words is "three hundred thirteen billion, one hundred sixty-four million, one hundred seventy-nine thousand, nine hundred eighty-one".