231671311 has 4 divisors (see below), whose sum is σ = 231702352. Its totient is φ = 231640272.

The previous prime is 231671303. The next prime is 231671317. The reversal of 231671311 is 113176132.

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 a cyclic number.

It is not a de Polignac number, because 231671311 - 2³ = 231671303 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 (231671317) 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, 3211 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (57925588).

Almost surely, 2^231671311 is an apocalyptic number.

231671311 is a deficient number, since it is larger than the sum of its proper divisors (31041).

231671311 is a wasteful number, since it uses less digits than its factorization.

231671311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31040.

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

The square root of 231671311 is about 15220.7526423630. The cubic root of 231671311 is about 614.1730450163.

The spelling of 231671311 in words is "two hundred thirty-one million, six hundred seventy-one thousand, three hundred eleven".