215213361 has 16 divisors (see below), whose sum is σ = 329514240. Its totient is φ = 123567120.

The previous prime is 215213351. The next prime is 215213363. The reversal of 215213361 is 163312512.

It is not a de Polignac number, because 215213361 - 2⁹ = 215212849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215213363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170995 + ... + 172248.

It is an arithmetic number, because the mean of its divisors is an integer number (20594640).

Almost surely, 2^215213361 is an apocalyptic number.

It is an amenable number.

215213361 is a deficient number, since it is larger than the sum of its proper divisors (114300879).

215213361 is a wasteful number, since it uses less digits than its factorization.

215213361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343276.

The product of its digits is 1080, while the sum is 24.

The square root of 215213361 is about 14670.1520442019. The cubic root of 215213361 is about 599.2707445588.

Adding to 215213361 its reverse (163312512), we get a palindrome (378525873).

The spelling of 215213361 in words is "two hundred fifteen million, two hundred thirteen thousand, three hundred sixty-one".