20250217 has 4 divisors (see below), whose sum is σ = 21807940. Its totient is φ = 18692496.

The previous prime is 20250203. The next prime is 20250227. The reversal of 20250217 is 71205202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3308761 + 16941456 = 1819^2 + 4116^2 .

It is a cyclic number.

It is not a de Polignac number, because 20250217 - 2⁷ = 20250089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20250194 and 20250203.

It is not an unprimeable number, because it can be changed into a prime (20250227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778842 + ... + 778867.

It is an arithmetic number, because the mean of its divisors is an integer number (5451985).

Almost surely, 2^20250217 is an apocalyptic number.

It is an amenable number.

20250217 is a deficient number, since it is larger than the sum of its proper divisors (1557723).

20250217 is a wasteful number, since it uses less digits than its factorization.

20250217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557722.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20250217 is about 4500.0241110465. The cubic root of 20250217 is about 272.5690625390.

Adding to 20250217 its reverse (71205202), we get a palindrome (91455419).

The spelling of 20250217 in words is "twenty million, two hundred fifty thousand, two hundred seventeen".