9981315 has 12 divisors (see below), whose sum is σ = 17301024. Its totient is φ = 5323344.

The previous prime is 9981271. The next prime is 9981317. The reversal of 9981315 is 5131899.

It is a happy number.

It is not a de Polignac number, because 9981315 - 2¹⁰ = 9980291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9981315.

It is not an unprimeable number, because it can be changed into a prime (9981317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110859 + ... + 110948.

It is an arithmetic number, because the mean of its divisors is an integer number (1441752).

Almost surely, 2^9981315 is an apocalyptic number.

9981315 is a deficient number, since it is larger than the sum of its proper divisors (7319709).

9981315 is a wasteful number, since it uses less digits than its factorization.

9981315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221818 (or 221815 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 9981315 is about 3159.3219209191. The cubic root of 9981315 is about 215.3091999673.

It can be divided in two parts, 9981 and 315, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 9981315 in words is "nine million, nine hundred eighty-one thousand, three hundred fifteen".