230405311 has 4 divisors (see below), whose sum is σ = 230437512. Its totient is φ = 230373112.

The previous prime is 230405303. The next prime is 230405333. The reversal of 230405311 is 113504032.

230405311 is a nontrivial binomial coefficient, being equal to C(21467, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 230405311 - 2³ = 230405303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230405411) 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, 1 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (57609378).

Almost surely, 2^230405311 is an apocalyptic number.

230405311 is the 21466-th triangular number.

230405311 is the 7156-th centered nonagonal number.

230405311 is a deficient number, since it is larger than the sum of its proper divisors (32201).

230405311 is a wasteful number, since it uses less digits than its factorization.

230405311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32200.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 230405311 is about 15179.1077142235. The cubic root of 230405311 is about 613.0522563756.

Adding to 230405311 its reverse (113504032), we get a palindrome (343909343).

The spelling of 230405311 in words is "two hundred thirty million, four hundred five thousand, three hundred eleven".