313123413521 has 4 divisors (see below), whose sum is σ = 329603593200. Its totient is φ = 296643233844.

The previous prime is 313123413509. The next prime is 313123413529. The reversal of 313123413521 is 125314321313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 313123413521 - 2¹⁸ = 313123151377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (313123413529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8240089811 + ... + 8240089848.

It is an arithmetic number, because the mean of its divisors is an integer number (82400898300).

Almost surely, 2^313123413521 is an apocalyptic number.

It is an amenable number.

313123413521 is a deficient number, since it is larger than the sum of its proper divisors (16480179679).

313123413521 is a wasteful number, since it uses less digits than its factorization.

313123413521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16480179678.

The product of its digits is 6480, while the sum is 29.

Adding to 313123413521 its reverse (125314321313), we get a palindrome (438437734834).

The spelling of 313123413521 in words is "three hundred thirteen billion, one hundred twenty-three million, four hundred thirteen thousand, five hundred twenty-one".