231432311 has 8 divisors (see below), whose sum is σ = 252814224. Its totient is φ = 210107520.

The previous prime is 231432269. The next prime is 231432337. The reversal of 231432311 is 113234132.

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

It is a cyclic number.

It is not a de Polignac number, because 231432311 - 2⁶ = 231432247 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 (231432361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5570 + ... + 22223.

It is an arithmetic number, because the mean of its divisors is an integer number (31601778).

Almost surely, 2^231432311 is an apocalyptic number.

231432311 is a deficient number, since it is larger than the sum of its proper divisors (21381913).

231432311 is a wasteful number, since it uses less digits than its factorization.

231432311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28561.

The product of its digits is 432, while the sum is 20.

The square root of 231432311 is about 15212.8994935219. The cubic root of 231432311 is about 613.9617717502.

Adding to 231432311 its reverse (113234132), we get a palindrome (344666443).

The spelling of 231432311 in words is "two hundred thirty-one million, four hundred thirty-two thousand, three hundred eleven".