115556217 has 16 divisors (see below), whose sum is σ = 180845952. Its totient is φ = 64247040.

The previous prime is 115556201. The next prime is 115556219. The reversal of 115556217 is 712655511.

It is a happy number.

It is not a de Polignac number, because 115556217 - 2⁴ = 115556201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115556219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73584 + ... + 75137.

It is an arithmetic number, because the mean of its divisors is an integer number (11302872).

Almost surely, 2^115556217 is an apocalyptic number.

It is an amenable number.

115556217 is a deficient number, since it is larger than the sum of its proper divisors (65289735).

115556217 is a wasteful number, since it uses less digits than its factorization.

115556217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148768.

The product of its digits is 10500, while the sum is 33.

The square root of 115556217 is about 10749.7077634697. The cubic root of 115556217 is about 487.0771676168.

The spelling of 115556217 in words is "one hundred fifteen million, five hundred fifty-six thousand, two hundred seventeen".