115505511 has 16 divisors (see below), whose sum is σ = 169402368. Its totient is φ = 70000920.

The previous prime is 115505501. The next prime is 115505567.

115505511 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 115505511 - 2⁵ = 115505479 is a prime.

It is a super-2 number, since 2×115505511² = 26683046142742242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115505501) 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, 10471 + ... + 18456.

It is an arithmetic number, because the mean of its divisors is an integer number (10587648).

Almost surely, 2^115505511 is an apocalyptic number.

115505511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115505511 is a deficient number, since it is larger than the sum of its proper divisors (53896857).

115505511 is an equidigital number, since it uses as much as digits as its factorization.

115505511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28963 (or 28941 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 24.

The square root of 115505511 is about 10747.3490219682. The cubic root of 115505511 is about 487.0059141356.

The spelling of 115505511 in words is "one hundred fifteen million, five hundred five thousand, five hundred eleven".