231831045 has 32 divisors (see below), whose sum is σ = 413145600. Its totient is φ = 123342912.

The previous prime is 231831043. The next prime is 231831077. The reversal of 231831045 is 540138132.

It is a happy number.

231831045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231831045 - 2¹ = 231831043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231831043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60651 + ... + 64359.

It is an arithmetic number, because the mean of its divisors is an integer number (12910800).

Almost surely, 2^231831045 is an apocalyptic number.

It is an amenable number.

231831045 is a deficient number, since it is larger than the sum of its proper divisors (181314555).

231831045 is a wasteful number, since it uses less digits than its factorization.

231831045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186 (or 4180 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 231831045 is about 15225.9989820044. The cubic root of 231831045 is about 614.3141670485.

Adding to 231831045 its reverse (540138132), we get a palindrome (771969177).

The spelling of 231831045 in words is "two hundred thirty-one million, eight hundred thirty-one thousand, forty-five".