215075983 has 2 divisors, whose sum is σ = 215075984. Its totient is φ = 215075982.

The previous prime is 215075957. The next prime is 215075989. The reversal of 215075983 is 389570512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215075983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215075989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107537991 + 107537992.

It is an arithmetic number, because the mean of its divisors is an integer number (107537992).

Almost surely, 2^215075983 is an apocalyptic number.

215075983 is a deficient number, since it is larger than the sum of its proper divisors (1).

215075983 is an equidigital number, since it uses as much as digits as its factorization.

215075983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 215075983 is about 14665.4690685297. The cubic root of 215075983 is about 599.1432057922.

The spelling of 215075983 in words is "two hundred fifteen million, seventy-five thousand, nine hundred eighty-three".