215703 has 10 divisors (see below), whose sum is σ = 322344. Its totient is φ = 143748.

The previous prime is 215693. The next prime is 215723. The reversal of 215703 is 307512.

It is not a de Polignac number, because 215703 - 2⁴ = 215687 is a prime.

215703 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215723) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1251 + ... + 1412.

2²¹⁵⁷⁰³ is an apocalyptic number.

215703 is a deficient number, since it is larger than the sum of its proper divisors (106641).

215703 is an equidigital number, since it uses as much as digits as its factorization.

215703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675 (or 2666 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 215703 is about 464.4383705079. The cubic root of 215703 is about 59.9724873862.

Subtracting 215703 from its reverse (307512), we obtain a square (91809 = 303²).

The spelling of 215703 in words is "two hundred fifteen thousand, seven hundred three".