215734073 has 2 divisors, whose sum is σ = 215734074. Its totient is φ = 215734072.

The previous prime is 215734039. The next prime is 215734091. The reversal of 215734073 is 370437512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215267584 + 466489 = 14672^2 + 683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215734073 is a prime.

It is not a weakly prime, because it can be changed into another prime (215734093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107867036 + 107867037.

It is an arithmetic number, because the mean of its divisors is an integer number (107867037).

Almost surely, 2^215734073 is an apocalyptic number.

It is an amenable number.

215734073 is a deficient number, since it is larger than the sum of its proper divisors (1).

215734073 is an equidigital number, since it uses as much as digits as its factorization.

215734073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 215734073 is about 14687.8886501771. Note that the first 3 decimals coincide. The cubic root of 215734073 is about 599.7536701795.

The spelling of 215734073 in words is "two hundred fifteen million, seven hundred thirty-four thousand, seventy-three".