115521033 has 4 divisors (see below), whose sum is σ = 154028048. Its totient is φ = 77014020.

The previous prime is 115521031. The next prime is 115521037. The reversal of 115521033 is 330125511.

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: 330125511 = 3 ⋅110041837.

It is not a de Polignac number, because 115521033 - 2¹ = 115521031 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115521031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19253503 + ... + 19253508.

It is an arithmetic number, because the mean of its divisors is an integer number (38507012).

Almost surely, 2^115521033 is an apocalyptic number.

It is an amenable number.

115521033 is a deficient number, since it is larger than the sum of its proper divisors (38507015).

115521033 is an equidigital number, since it uses as much as digits as its factorization.

115521033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38507014.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 115521033 is about 10748.0711292771. The cubic root of 115521033 is about 487.0277282960.

Adding to 115521033 its reverse (330125511), we get a palindrome (445646544).

The spelling of 115521033 in words is "one hundred fifteen million, five hundred twenty-one thousand, thirty-three".