313023040145 has 4 divisors (see below), whose sum is σ = 375627648180. Its totient is φ = 250418432112.

The previous prime is 313023040117. The next prime is 313023040171. The reversal of 313023040145 is 541040320313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541040320313 = 727 ⋅744209519.

It can be written as a sum of positive squares in 2 ways, for example, as 112241080576 + 200781959569 = 335024^2 + 448087^2 .

It is a cyclic number.

It is not a de Polignac number, because 313023040145 - 2¹⁸ = 313022778001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31302304010 + ... + 31302304019.

It is an arithmetic number, because the mean of its divisors is an integer number (93906912045).

Almost surely, 2^313023040145 is an apocalyptic number.

It is an amenable number.

313023040145 is a deficient number, since it is larger than the sum of its proper divisors (62604608035).

313023040145 is an equidigital number, since it uses as much as digits as its factorization.

313023040145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62604608034.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 313023040145 its reverse (541040320313), we get a palindrome (854063360458).

The spelling of 313023040145 in words is "three hundred thirteen billion, twenty-three million, forty thousand, one hundred forty-five".