115545221 has 8 divisors (see below), whose sum is σ = 126498144. Its totient is φ = 104667120.

The previous prime is 115545217. The next prime is 115545253. The reversal of 115545221 is 122545511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115545221 - 2² = 115545217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115545271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15446 + ... + 21671.

It is an arithmetic number, because the mean of its divisors is an integer number (15812268).

Almost surely, 2^115545221 is an apocalyptic number.

115545221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115545221 is a deficient number, since it is larger than the sum of its proper divisors (10952923).

115545221 is a wasteful number, since it uses less digits than its factorization.

115545221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37411.

The product of its digits is 2000, while the sum is 26.

The square root of 115545221 is about 10749.1962955376. The cubic root of 115545221 is about 487.0617175021.

The spelling of 115545221 in words is "one hundred fifteen million, five hundred forty-five thousand, two hundred twenty-one".