115328821 has 2 divisors, whose sum is σ = 115328822. Its totient is φ = 115328820.

The previous prime is 115328809. The next prime is 115328869. The reversal of 115328821 is 128823511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104346225 + 10982596 = 10215^2 + 3314^2 .

It is a cyclic number.

It is not a de Polignac number, because 115328821 - 2¹¹ = 115326773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115328891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57664410 + 57664411.

It is an arithmetic number, because the mean of its divisors is an integer number (57664411).

Almost surely, 2^115328821 is an apocalyptic number.

It is an amenable number.

115328821 is a deficient number, since it is larger than the sum of its proper divisors (1).

115328821 is an equidigital number, since it uses as much as digits as its factorization.

115328821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 31.

The square root of 115328821 is about 10739.1257092931. The cubic root of 115328821 is about 486.7574613756.

The spelling of 115328821 in words is "one hundred fifteen million, three hundred twenty-eight thousand, eight hundred twenty-one".