313000015221 has 6 divisors (see below), whose sum is σ = 452111133110. Its totient is φ = 208666676808.

The previous prime is 313000015219. The next prime is 313000015261. The reversal of 313000015221 is 122510000313.

It can be written as a sum of positive squares in only one way, i.e., 277913480625 + 35086534596 = 527175^2 + 187314^2 .

It is not a de Polignac number, because 313000015221 - 2¹ = 313000015219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313000015194 and 313000015203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313000015261) 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, 17388889726 + ... + 17388889743.

Almost surely, 2^313000015221 is an apocalyptic number.

It is an amenable number.

313000015221 is a deficient number, since it is larger than the sum of its proper divisors (139111117889).

313000015221 is a wasteful number, since it uses less digits than its factorization.

313000015221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34777779475 (or 34777779472 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 313000015221 its reverse (122510000313), we get a palindrome (435510015534).

The spelling of 313000015221 in words is "three hundred thirteen billion, fifteen thousand, two hundred twenty-one".