215967673 has 2 divisors, whose sum is σ = 215967674. Its totient is φ = 215967672.

The previous prime is 215967641. The next prime is 215967683. The reversal of 215967673 is 376769512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128414224 + 87553449 = 11332^2 + 9357^2 .

It is a cyclic number.

It is not a de Polignac number, because 215967673 - 2⁵ = 215967641 is a prime.

It is not a weakly prime, because it can be changed into another prime (215967613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107983836 + 107983837.

It is an arithmetic number, because the mean of its divisors is an integer number (107983837).

Almost surely, 2^215967673 is an apocalyptic number.

It is an amenable number.

215967673 is a deficient number, since it is larger than the sum of its proper divisors (1).

215967673 is an equidigital number, since it uses as much as digits as its factorization.

215967673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The square root of 215967673 is about 14695.8386286731. The cubic root of 215967673 is about 599.9700660992.

The spelling of 215967673 in words is "two hundred fifteen million, nine hundred sixty-seven thousand, six hundred seventy-three".