115534430221 has 24 divisors (see below), whose sum is σ = 134701600320. Its totient is φ = 97058146752.

The previous prime is 115534430203. The next prime is 115534430237. The reversal of 115534430221 is 122034435511.

It is not a de Polignac number, because 115534430221 - 2¹⁷ = 115534299149 is a prime.

It is a super-2 number, since 2×115534430221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115534430261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9364785 + ... + 9377113.

It is an arithmetic number, because the mean of its divisors is an integer number (5612566680).

Almost surely, 2^115534430221 is an apocalyptic number.

It is an amenable number.

115534430221 is a deficient number, since it is larger than the sum of its proper divisors (19167170099).

115534430221 is an equidigital number, since it uses as much as digits as its factorization.

115534430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12673 (or 12546 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 115534430221 its reverse (122034435511), we get a palindrome (237568865732).

The spelling of 115534430221 in words is "one hundred fifteen billion, five hundred thirty-four million, four hundred thirty thousand, two hundred twenty-one".