215320933 has 2 divisors, whose sum is σ = 215320934. Its totient is φ = 215320932.

The previous prime is 215320907. The next prime is 215320951. The reversal of 215320933 is 339023512.

215320933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152324964 + 62995969 = 12342^2 + 7937^2 .

It is a cyclic number.

It is not a de Polignac number, because 215320933 - 2¹⁷ = 215189861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215320033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107660466 + 107660467.

It is an arithmetic number, because the mean of its divisors is an integer number (107660467).

Almost surely, 2^215320933 is an apocalyptic number.

It is an amenable number.

215320933 is a deficient number, since it is larger than the sum of its proper divisors (1).

215320933 is an equidigital number, since it uses as much as digits as its factorization.

215320933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 215320933 is about 14673.8179421717. The cubic root of 215320933 is about 599.3705741954.

The spelling of 215320933 in words is "two hundred fifteen million, three hundred twenty thousand, nine hundred thirty-three".