313117180317621 has 6 divisors (see below), whose sum is σ = 452280371569910. Its totient is φ = 208744786878408.

The previous prime is 313117180317589. The next prime is 313117180317661. The reversal of 313117180317621 is 126713081711313.

313117180317621 is a `hidden beast` number, since 3 + 1 + 3 + 1 + 1 + 7 + 1 + 8 + 0 + 3 + 17 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 193719381092721 + 119397799224900 = 13918311^2 + 10926930^2 .

It is not a de Polignac number, because 313117180317621 - 2⁵ = 313117180317589 is a prime.

It is a super-2 number, since 2×313117180317621² (a number of 30 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 (313117180317661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17395398906526 + ... + 17395398906543.

Almost surely, 2^{313117180317621} is an apocalyptic number.

It is an amenable number.

313117180317621 is a deficient number, since it is larger than the sum of its proper divisors (139163191252289).

313117180317621 is a wasteful number, since it uses less digits than its factorization.

313117180317621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34790797813075 (or 34790797813072 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 313117180317621 in words is "three hundred thirteen trillion, one hundred seventeen billion, one hundred eighty million, three hundred seventeen thousand, six hundred twenty-one".