230021917 has 4 divisors (see below), whose sum is σ = 243552636. Its totient is φ = 216491200.

The previous prime is 230021903. The next prime is 230021929. The reversal of 230021917 is 719120032.

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 74545956 + 155475961 = 8634^2 + 12469^2 .

It is a cyclic number.

It is not a de Polignac number, because 230021917 - 2¹¹ = 230019869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230021891 and 230021900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230021977) 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, 6765334 + ... + 6765367.

It is an arithmetic number, because the mean of its divisors is an integer number (60888159).

Almost surely, 2^230021917 is an apocalyptic number.

It is an amenable number.

230021917 is a deficient number, since it is larger than the sum of its proper divisors (13530719).

230021917 is a wasteful number, since it uses less digits than its factorization.

230021917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530718.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 230021917 is about 15166.4734529817. The cubic root of 230021917 is about 612.7120283293.

Adding to 230021917 its reverse (719120032), we get a palindrome (949141949).

The spelling of 230021917 in words is "two hundred thirty million, twenty-one thousand, nine hundred seventeen".