23217730 has 8 divisors (see below), whose sum is σ = 41791932. Its totient is φ = 9287088.

The previous prime is 23217713. The next prime is 23217731. The reversal of 23217730 is 3771232.

It can be written as a sum of positive squares in 2 ways, for example, as 21818241 + 1399489 = 4671^2 + 1183^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 23217695 and 23217704.

It is not an unprimeable number, because it can be changed into a prime (23217731) 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, 1160877 + ... + 1160896.

Almost surely, 2^23217730 is an apocalyptic number.

23217730 is a deficient number, since it is larger than the sum of its proper divisors (18574202).

23217730 is a wasteful number, since it uses less digits than its factorization.

23217730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321780.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 23217730 is about 4818.4779754607. The cubic root of 23217730 is about 285.2812653679.

Adding to 23217730 its reverse (3771232), we get a palindrome (26988962).

The spelling of 23217730 in words is "twenty-three million, two hundred seventeen thousand, seven hundred thirty".