215801199 has 24 divisors (see below), whose sum is σ = 330390960. Its totient is φ = 139209840.

The previous prime is 215801189. The next prime is 215801233. The reversal of 215801199 is 991108512.

It is not a de Polignac number, because 215801199 - 2¹³ = 215793007 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215801129) 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 23 ways as a sum of consecutive naturals, for example, 21789 + ... + 30105.

It is an arithmetic number, because the mean of its divisors is an integer number (13766290).

Almost surely, 2^215801199 is an apocalyptic number.

215801199 is a deficient number, since it is larger than the sum of its proper divisors (114589761).

215801199 is an equidigital number, since it uses as much as digits as its factorization.

215801199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8388 (or 8351 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 215801199 is about 14690.1735524125. The cubic root of 215801199 is about 599.8158684984.

It can be divided in two parts, 215801 and 199, that added together give a cube (216000 = 60³).

The spelling of 215801199 in words is "two hundred fifteen million, eight hundred one thousand, one hundred ninety-nine".