231404311 has 8 divisors (see below), whose sum is σ = 249792480. Its totient is φ = 213710112.

The previous prime is 231404279. The next prime is 231404317. The reversal of 231404311 is 113404132.

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

It is not a de Polignac number, because 231404311 - 2⁵ = 231404279 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 (231404317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172800 + ... + 174133.

It is an arithmetic number, because the mean of its divisors is an integer number (31224060).

Almost surely, 2^231404311 is an apocalyptic number.

231404311 is a deficient number, since it is larger than the sum of its proper divisors (18388169).

231404311 is a wasteful number, since it uses less digits than its factorization.

231404311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346985.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 231404311 is about 15211.9791940431. The cubic root of 231404311 is about 613.9370105534.

Adding to 231404311 its reverse (113404132), we get a palindrome (344808443).

The spelling of 231404311 in words is "two hundred thirty-one million, four hundred four thousand, three hundred eleven".