203240217 has 8 divisors (see below), whose sum is σ = 271214496. Its totient is φ = 135379712.

The previous prime is 203240183. The next prime is 203240221. The reversal of 203240217 is 712042302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203240217 - 2⁶ = 203240153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203240193 and 203240202.

It is not an unprimeable number, because it can be changed into a prime (203240237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24183 + ... + 31484.

It is an arithmetic number, because the mean of its divisors is an integer number (33901812).

Almost surely, 2^203240217 is an apocalyptic number.

It is an amenable number.

203240217 is a deficient number, since it is larger than the sum of its proper divisors (67974279).

203240217 is a wasteful number, since it uses less digits than its factorization.

203240217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56887.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 203240217 is about 14256.2343204649. The cubic root of 203240217 is about 587.9447950162.

Adding to 203240217 its reverse (712042302), we get a palindrome (915282519).

The spelling of 203240217 in words is "two hundred three million, two hundred forty thousand, two hundred seventeen".