313404181231 has 2 divisors, whose sum is σ = 313404181232. Its totient is φ = 313404181230.

The previous prime is 313404181213. The next prime is 313404181289. The reversal of 313404181231 is 132181404313.

Together with previous prime (313404181213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313404181231 - 2²³ = 313395792623 is a prime.

It is a super-3 number, since 3×313404181231³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 313404181193 and 313404181202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313404181201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156702090615 + 156702090616.

It is an arithmetic number, because the mean of its divisors is an integer number (156702090616).

Almost surely, 2^313404181231 is an apocalyptic number.

313404181231 is a deficient number, since it is larger than the sum of its proper divisors (1).

313404181231 is an equidigital number, since it uses as much as digits as its factorization.

313404181231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 313404181231 its reverse (132181404313), we get a palindrome (445585585544).

The spelling of 313404181231 in words is "three hundred thirteen billion, four hundred four million, one hundred eighty-one thousand, two hundred thirty-one".