115573221 has 12 divisors (see below), whose sum is σ = 167139648. Its totient is φ = 76956264.

The previous prime is 115573217. The next prime is 115573253. The reversal of 115573221 is 122375511.

It is not a de Polignac number, because 115573221 - 2² = 115573217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115573291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 676 + ... + 15218.

It is an arithmetic number, because the mean of its divisors is an integer number (13928304).

Almost surely, 2^115573221 is an apocalyptic number.

It is an amenable number.

115573221 is a deficient number, since it is larger than the sum of its proper divisors (51566427).

115573221 is a wasteful number, since it uses less digits than its factorization.

115573221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15432 (or 15429 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 115573221 is about 10750.4986395981. The cubic root of 115573221 is about 487.1010574434.

The spelling of 115573221 in words is "one hundred fifteen million, five hundred seventy-three thousand, two hundred twenty-one".