115583821 has 8 divisors (see below), whose sum is σ = 125863200. Its totient is φ = 105724080.

The previous prime is 115583807. The next prime is 115583827. The reversal of 115583821 is 128385511.

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

It is a cyclic number.

It is not a de Polignac number, because 115583821 - 2¹⁵ = 115551053 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 (115583827) 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, 104335 + ... + 105436.

It is an arithmetic number, because the mean of its divisors is an integer number (15732900).

Almost surely, 2^115583821 is an apocalyptic number.

It is an amenable number.

115583821 is a deficient number, since it is larger than the sum of its proper divisors (10279379).

115583821 is a wasteful number, since it uses less digits than its factorization.

115583821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209819.

The product of its digits is 9600, while the sum is 34.

The square root of 115583821 is about 10750.9916286824. The cubic root of 115583821 is about 487.1159487631.

The spelling of 115583821 in words is "one hundred fifteen million, five hundred eighty-three thousand, eight hundred twenty-one".