10115217 has 18 divisors (see below), whose sum is σ = 16997058. Its totient is φ = 5779872.

The previous prime is 10115213. The next prime is 10115227. The reversal of 10115217 is 71251101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7568001 + 2547216 = 2751^2 + 1596^2 .

It is not a de Polignac number, because 10115217 - 2² = 10115213 is a prime.

It is a super-2 number, since 2×10115217² = 204635229914178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10115217.

It is not an unprimeable number, because it can be changed into a prime (10115213) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11028 + ... + 11909.

It is an arithmetic number, because the mean of its divisors is an integer number (944281).

Almost surely, 2^10115217 is an apocalyptic number.

It is an amenable number.

10115217 is a deficient number, since it is larger than the sum of its proper divisors (6881841).

10115217 is a wasteful number, since it uses less digits than its factorization.

10115217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22957 (or 22947 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 10115217 is about 3180.4428936863. The cubic root of 10115217 is about 216.2677364138.

Adding to 10115217 its reverse (71251101), we get a palindrome (81366318).

The spelling of 10115217 in words is "ten million, one hundred fifteen thousand, two hundred seventeen".