215310233 has 4 divisors (see below), whose sum is σ = 215555508. Its totient is φ = 215064960.

The previous prime is 215310211. The next prime is 215310241. The reversal of 215310233 is 332013512.

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 89264704 + 126045529 = 9448^2 + 11227^2 .

It is a cyclic number.

It is not a de Polignac number, because 215310233 - 2¹⁴ = 215293849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215312233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121316 + ... + 123077.

It is an arithmetic number, because the mean of its divisors is an integer number (53888877).

Almost surely, 2^215310233 is an apocalyptic number.

It is an amenable number.

215310233 is a deficient number, since it is larger than the sum of its proper divisors (245275).

215310233 is an equidigital number, since it uses as much as digits as its factorization.

215310233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245274.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 215310233 is about 14673.4533426866. The cubic root of 215310233 is about 599.3606458042.

Adding to 215310233 its reverse (332013512), we get a palindrome (547323745).

The spelling of 215310233 in words is "two hundred fifteen million, three hundred ten thousand, two hundred thirty-three".