115502021 has 4 divisors (see below), whose sum is σ = 120523872. Its totient is φ = 110480172.

The previous prime is 115502017. The next prime is 115502027. The reversal of 115502021 is 120205511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120205511 = 43 ⋅2795477.

It is a cyclic number.

It is not a de Polignac number, because 115502021 - 2² = 115502017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115502027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510891 + ... + 2510936.

It is an arithmetic number, because the mean of its divisors is an integer number (30130968).

Almost surely, 2^115502021 is an apocalyptic number.

It is an amenable number.

115502021 is a deficient number, since it is larger than the sum of its proper divisors (5021851).

115502021 is an equidigital number, since it uses as much as digits as its factorization.

115502021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021850.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 115502021 is about 10747.1866551205. The cubic root of 115502021 is about 487.0010091236.

Adding to 115502021 its reverse (120205511), we get a palindrome (235707532).

The spelling of 115502021 in words is "one hundred fifteen million, five hundred two thousand, twenty-one".