215085229 has 4 divisors (see below), whose sum is σ = 218031676. Its totient is φ = 212138784.

The previous prime is 215085179. The next prime is 215085253. The reversal of 215085229 is 922580512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163891204 + 51194025 = 12802^2 + 7155^2 .

It is a cyclic number.

It is not a de Polignac number, because 215085229 - 2⁹ = 215084717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215085194 and 215085203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215085929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473114 + ... + 1473259.

It is an arithmetic number, because the mean of its divisors is an integer number (54507919).

Almost surely, 2^215085229 is an apocalyptic number.

It is an amenable number.

215085229 is a deficient number, since it is larger than the sum of its proper divisors (2946447).

215085229 is an equidigital number, since it uses as much as digits as its factorization.

215085229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946446.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 215085229 is about 14665.7842954272. The cubic root of 215085229 is about 599.1517912831.

The spelling of 215085229 in words is "two hundred fifteen million, eighty-five thousand, two hundred twenty-nine".