215319233 has 2 divisors, whose sum is σ = 215319234. Its totient is φ = 215319232.

The previous prime is 215319217. The next prime is 215319239. The reversal of 215319233 is 332913512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198443569 + 16875664 = 14087^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 215319233 - 2⁴ = 215319217 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 215319196 and 215319205.

It is not a weakly prime, because it can be changed into another prime (215319239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107659616 + 107659617.

It is an arithmetic number, because the mean of its divisors is an integer number (107659617).

Almost surely, 2^215319233 is an apocalyptic number.

It is an amenable number.

215319233 is a deficient number, since it is larger than the sum of its proper divisors (1).

215319233 is an equidigital number, since it uses as much as digits as its factorization.

215319233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 29.

The square root of 215319233 is about 14673.7600157560. The cubic root of 215319233 is about 599.3689968094.

The spelling of 215319233 in words is "two hundred fifteen million, three hundred nineteen thousand, two hundred thirty-three".