231135723 has 72 divisors (see below), whose sum is σ = 437812128. Its totient is φ = 114656256.

The previous prime is 231135701. The next prime is 231135731. The reversal of 231135723 is 327531132.

It is a de Polignac number, because none of the positive numbers 2^k-231135723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231135523) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 180361 + ... + 181637.

It is an arithmetic number, because the mean of its divisors is an integer number (6080724).

Almost surely, 2^231135723 is an apocalyptic number.

231135723 is a deficient number, since it is larger than the sum of its proper divisors (206676405).

231135723 is a wasteful number, since it uses less digits than its factorization.

231135723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1317 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 231135723 is about 15203.1484568164. The cubic root of 231135723 is about 613.6993890043.

Adding to 231135723 its sum of digits (27), we get a triangular number (231135750 = T₂₁₅₀₀).

Adding to 231135723 its reverse (327531132), we get a palindrome (558666855).

The spelling of 231135723 in words is "two hundred thirty-one million, one hundred thirty-five thousand, seven hundred twenty-three".