231823287 has 12 divisors (see below), whose sum is σ = 336793704. Its totient is φ = 153654480.

The previous prime is 231823231. The next prime is 231823357. The reversal of 231823287 is 782328132.

It is a happy number.

It is not a de Polignac number, because 231823287 - 2¹⁰ = 231822263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231823087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72889 + ... + 76002.

It is an arithmetic number, because the mean of its divisors is an integer number (28066142).

Almost surely, 2^231823287 is an apocalyptic number.

231823287 is a deficient number, since it is larger than the sum of its proper divisors (104970417).

231823287 is a wasteful number, since it uses less digits than its factorization.

231823287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149070 (or 149067 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 231823287 is about 15225.7442182640. The cubic root of 231823287 is about 614.3073144971.

The spelling of 231823287 in words is "two hundred thirty-one million, eight hundred twenty-three thousand, two hundred eighty-seven".