115655217 has 16 divisors (see below), whose sum is σ = 156014592. Its totient is φ = 76204800.

The previous prime is 115655209. The next prime is 115655257. The reversal of 115655217 is 712556511.

It is a happy number.

It is not a de Polignac number, because 115655217 - 2³ = 115655209 is a prime.

It is a super-2 number, since 2×115655217² = 26752258438634178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115655257) 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, 152403 + ... + 153159.

It is an arithmetic number, because the mean of its divisors is an integer number (9750912).

Almost surely, 2^115655217 is an apocalyptic number.

It is an amenable number.

115655217 is a deficient number, since it is larger than the sum of its proper divisors (40359375).

115655217 is a wasteful number, since it uses less digits than its factorization.

115655217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

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

The square root of 115655217 is about 10754.3115539769. The cubic root of 115655217 is about 487.2162251156.

The spelling of 115655217 in words is "one hundred fifteen million, six hundred fifty-five thousand, two hundred seventeen".