313146521431 has 4 divisors (see below), whose sum is σ = 313490261664. Its totient is φ = 312802781200.

The previous prime is 313146521417. The next prime is 313146521459. The reversal of 313146521431 is 134125641313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313146521431 is a prime.

It is a super-2 number, since 2×313146521431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313146521461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171868750 + ... + 171870571.

It is an arithmetic number, because the mean of its divisors is an integer number (78372565416).

Almost surely, 2^313146521431 is an apocalyptic number.

313146521431 is a deficient number, since it is larger than the sum of its proper divisors (343740233).

313146521431 is an equidigital number, since it uses as much as digits as its factorization.

313146521431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343740232.

The product of its digits is 25920, while the sum is 34.

The spelling of 313146521431 in words is "three hundred thirteen billion, one hundred forty-six million, five hundred twenty-one thousand, four hundred thirty-one".