231225745 has 16 divisors (see below), whose sum is σ = 288110592. Its totient is φ = 177958080.

The previous prime is 231225737. The next prime is 231225751. The reversal of 231225745 is 547522132.

It is not a de Polignac number, because 231225745 - 2³ = 231225737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22504 + ... + 31126.

It is an arithmetic number, because the mean of its divisors is an integer number (18006912).

Almost surely, 2^231225745 is an apocalyptic number.

It is an amenable number.

231225745 is a deficient number, since it is larger than the sum of its proper divisors (56884847).

231225745 is a wasteful number, since it uses less digits than its factorization.

231225745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8832.

The product of its digits is 16800, while the sum is 31.

The square root of 231225745 is about 15206.1088053453. The cubic root of 231225745 is about 613.7790525527.

Adding to 231225745 its reverse (547522132), we get a palindrome (778747877).

The spelling of 231225745 in words is "two hundred thirty-one million, two hundred twenty-five thousand, seven hundred forty-five".