313781217373 has 24 divisors (see below), whose sum is σ = 360362904552. Its totient is φ = 271544745984.

The previous prime is 313781217371. The next prime is 313781217401. The reversal of 313781217373 is 373712187313.

It can be written as a sum of positive squares in 12 ways, for example, as 2263190329 + 311518027044 = 47573^2 + 558138^2 .

It is not a de Polignac number, because 313781217373 - 2¹ = 313781217371 is a prime.

It is a super-2 number, since 2×313781217373² (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 (313781217371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 803061 + ... + 1128037.

It is an arithmetic number, because the mean of its divisors is an integer number (15015121023).

Almost surely, 2^313781217373 is an apocalyptic number.

It is an amenable number.

313781217373 is a deficient number, since it is larger than the sum of its proper divisors (46581687179).

313781217373 is a wasteful number, since it uses less digits than its factorization.

313781217373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325281 (or 325264 counting only the distinct ones).

The product of its digits is 444528, while the sum is 46.

The spelling of 313781217373 in words is "three hundred thirteen billion, seven hundred eighty-one million, two hundred seventeen thousand, three hundred seventy-three".