115321821 has 8 divisors (see below), whose sum is σ = 155928384. Its totient is φ = 75798240.

The previous prime is 115321783. The next prime is 115321841. The reversal of 115321821 is 128123511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115321821 - 2⁶ = 115321757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115321791 and 115321800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115321841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270496 + ... + 270921.

It is an arithmetic number, because the mean of its divisors is an integer number (19491048).

Almost surely, 2^115321821 is an apocalyptic number.

It is an amenable number.

115321821 is a deficient number, since it is larger than the sum of its proper divisors (40606563).

115321821 is an equidigital number, since it uses as much as digits as its factorization.

115321821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541491.

The product of its digits is 480, while the sum is 24.

The square root of 115321821 is about 10738.7997932730. The cubic root of 115321821 is about 486.7476130967.

The spelling of 115321821 in words is "one hundred fifteen million, three hundred twenty-one thousand, eight hundred twenty-one".