115043821 has 4 divisors (see below), whose sum is σ = 118754944. Its totient is φ = 111332700.

The previous prime is 115043801. The next prime is 115043833. The reversal of 115043821 is 128340511.

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: 128340511 = 13 ⋅9872347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115043821 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 (115043801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855515 + ... + 1855576.

It is an arithmetic number, because the mean of its divisors is an integer number (29688736).

Almost surely, 2^115043821 is an apocalyptic number.

It is an amenable number.

115043821 is a deficient number, since it is larger than the sum of its proper divisors (3711123).

115043821 is an equidigital number, since it uses as much as digits as its factorization.

115043821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711122.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 115043821 is about 10725.8482648227. The cubic root of 115043821 is about 486.3561731133.

The spelling of 115043821 in words is "one hundred fifteen million, forty-three thousand, eight hundred twenty-one".