230021311 has 4 divisors (see below), whose sum is σ = 247715272. Its totient is φ = 212327352.

The previous prime is 230021293. The next prime is 230021347. The reversal of 230021311 is 113120032.

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

It is a cyclic number.

It is not a de Polignac number, because 230021311 - 2⁵ = 230021279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 17693947 = 230021311 / (2 + 3 + 0 + 0 + 2 + 1 + 3 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230021291 and 230021300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230021411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8846961 + ... + 8846986.

It is an arithmetic number, because the mean of its divisors is an integer number (61928818).

Almost surely, 2^230021311 is an apocalyptic number.

230021311 is a deficient number, since it is larger than the sum of its proper divisors (17693961).

230021311 is a wasteful number, since it uses less digits than its factorization.

230021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17693960.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 230021311 is about 15166.4534746921. The cubic root of 230021311 is about 612.7114902591.

Adding to 230021311 its reverse (113120032), we get a palindrome (343141343).

The spelling of 230021311 in words is "two hundred thirty million, twenty-one thousand, three hundred eleven".