115207217 has 4 divisors (see below), whose sum is σ = 115329060. Its totient is φ = 115085376.

The previous prime is 115207187. The next prime is 115207219. The reversal of 115207217 is 712702511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64384576 + 50822641 = 8024^2 + 7129^2 .

It is a cyclic number.

It is not a de Polignac number, because 115207217 - 2¹⁰ = 115206193 is a prime.

It is a super-3 number, since 3×115207217³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115207219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59492 + ... + 61397.

It is an arithmetic number, because the mean of its divisors is an integer number (28832265).

Almost surely, 2^115207217 is an apocalyptic number.

It is an amenable number.

115207217 is a deficient number, since it is larger than the sum of its proper divisors (121843).

115207217 is an equidigital number, since it uses as much as digits as its factorization.

115207217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121842.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 115207217 is about 10733.4624888710. The cubic root of 115207217 is about 486.5863203716.

Adding to 115207217 its reverse (712702511), we get a palindrome (827909728).

The spelling of 115207217 in words is "one hundred fifteen million, two hundred seven thousand, two hundred seventeen".